Challenge EH-3D Guide

F.352-LT
November 2018
MODEL EH-3D
Technical Service and Parts Manual
Serial Numbers:
085279 through 159999,
EH3-D-150000 and up
Sold and Serviced by
The Challenge Machinery Company
6125 Norton Center Drive
Norton Shores, MI 49441-6081 USA
ChallengeMachinery.com
The Challenge Machinery Company provides owner's manuals on its
products solely as a courtesy to its customers. See the information below
before using this manual.
These manuals are for reference only. These manuals include products which are noncurrent,
unsupported or no longer produced by The Challenge Machinery Company, and are provided solely as
an accommodation to our customers. By providing these manuals, The Challenge Machinery Company
makes no representation or warranty as to the products, their current condition, or their suitability or fitness
for use in any particular application, which are the sole and independent responsibility of the product
owner and user.
Older products may not comply with current safety procedures, guidelines or regulations, and it
is the product owner's and user's responsibility to evaluate the suitability and fitness of the
products in their current use and application. The Challenge Machinery Company makes no
representation, warranty or recommendation regarding any modifications which may be required
on non-current or unsupported products. The Challenge Machinery Company assumes no liability
for any modification or alteration to any Challenge product, and any such modification or
alteration to any Challenge product is not authorized by The Challenge Machinery Company. The
availability of these manuals is solely for the purpose of providing reference information for the products.
This manual may not be complete in all aspects of product maintenance and repair. All products should
be used only by qualified and properly trained personnel, following proper safety procedures. All
products should be regularly inspected and maintained, and their condition, application and use should
be periodically evaluated by qualified personnel. Only qualified and properly trained technicians should
perform maintenance, repair and replacement procedures. Attempting these procedures without proper
training may cause machine damage or operator injury!
Products may be unsupported by The Challenge Machinery Company due to age or the unavailability of
parts from their original manufacturer. No parts or product support will be available to repair or maintain
unsupported products. Older products may not be UL listed (if the product does not have a UL label it is
not a listed product), and may not comply with applicable installation or other regulations or requirements
if relocated to a new facility. Many municipalities require a product to be UL listed before an electrician
will connect power to them. Often the cost of updating an older product to comply with current safety
regulations is greater than the value of the product.

1.0 Introduction
2
1.0 Introduction
THIS MANUAL is designed to help you get the most from your Challenge equipment. Keep this
manual in a safe, convenient place for quick reference by operators and service personnel.
SAFETY ALERT! This symbol means CAUTION: Personal safety
instructions! Pay special attention to the instructions in bold type. Personal injury may result if the
precautions are not read and followed.
READ THIS MANUAL BEFORE OPERATING! Follow precautions and instructions given and you
should have years of trouble-free operation. If after reading the manual questions still remain, contact
your Authorized Challenge Dealer.
FOR PARTS AND SERVICE contact the Authorized Challenge Dealer from whom you purchased
your machine. Use the illustrations and parts lists at the back of this manual to identify the correct
parts needed. Always give the SERIAL NUMBER and MODEL of your machine to insure the correct
parts are sent as soon as possible.
Take a few minutes right now to RECORD YOUR MACHINE SERIAL NUMBER in the space
provided on the front cover of this manual. Also be sure to fill out the warranty card accompanying
your machine and return it DIRECTLY TO CHALLENGE.
If you bought a used machine, it is important to have the following information on record at Challenge.
Copy this page, fill in the information and send it care of The Challenge Service Department, 6125
Norton Center Dr. Norton Shores MI 49441-6081.
CHALLENGE MODEL
SERIAL NUMBER
ATTN
COMPANY
ADDRESS
CITY
STATE/PROVINCE
ZIP
PHONE
DATE INSTALLED
DEALER NAME & CITY
* WARRANTY INFORMATION *
It is very important that you read and understand the conditions outlined in the Warranty Information
Sheet attached to the outside of the shipping container of your machine.
The Warranty Information Sheet must be filled out completely and returned to THE CHALLENGE
MACHINERY COMPANY in order for the warranty to be issued for this machine.
Challenge® is a registered trademark of The Challenge Machinery Company6125 Norton Center Dr.Norton Shores MI
49441-6081 Copyright© 2012 by The Challenge Machinery Company. All rights reserved. Printed in the U.S.A

1.0 Introduction
3
TABLE OF CONTENTS
1.0 Introduction .......................................................................................................................................2
2.0 Safety................................................................................................................................................5
2.1 Precautions...................................................................................................................................5
2.2 Power Lockout Procedure ............................................................................................................5
2.3 Warning Label Definitions.............................................................................................................6
3.0 Specifications....................................................................................................................................7
4.0 Installation Guide ..............................................................................................................................8
4.1 Uncrating the Paper Drill...............................................................................................................9
4.2 Installing the Table and Backgauge .............................................................................................9
4.2.1 Using Standard Backgauge:..................................................................................................9
4.2.2 Using Auto-Trip Backgauge: .............................................................................................. 10
4.3 Installing the Drill Blocks and Drills............................................................................................ 11
4.4 Hydraulic Level Check............................................................................................................... 11
4.5 Hooking up the Power Line ....................................................................................................... 11
4.6 Installing the Chip Container ..................................................................................................... 12
5.0 Operation ....................................................................................................................................... 13
5.1 Starting the Machine.................................................................................................................. 13
5.2 Operating the Drill...................................................................................................................... 13
5.3 Adjusting the Vertical Stroke ..................................................................................................... 13
5.4 Setting the Distance between Drill Heads................................................................................. 13
5.5 Setting the Backgauge Position................................................................................................. 14
5.6 Using the Side Guide................................................................................................................. 14
5.7 Adjusting the Stroke Speed....................................................................................................... 14
5.8 Removing the Cutting Blocks .................................................................................................... 15
5.9 Removing the Drills from the Spindle ........................................................................................ 15
6.0 Drilling Tips .................................................................................................................................... 16
7.0 Accessories for Challenge Paper Drilling Machine........................................................................ 17
7.1 Genuine Challenge Hollow Drills............................................................................................... 17
7.2 Challenge Drill-Ease Lubricant Stick......................................................................................... 18
7.3 Challenge Drilling Blocks........................................................................................................... 18
7.4 Handi-Sharp Drill Sharpner........................................................................................................ 18
7.5 Hollow Drill Sharpener............................................................................................................... 18
7.5.1 Using the Chip Remover.................................................................................................... 18
7.5.2 Using the Drill Sharpener................................................................................................... 18
7.6 Right Side Guide Kit .................................................................................................................. 19
7.7 Auto-Trip Backgauge................................................................................................................. 19
7.7.1 Setting the side guide stops............................................................................................... 20
7.8 Fixed Gages .............................................................................................................................. 20
7.9 Two-Hand Control Kit ................................................................................................................ 21
7.10 Drill Shield Kit .......................................................................................................................... 22
8.0 Maintenance Guide........................................................................................................................ 23
8.1 Troubleshooting......................................................................................................................... 24
8.2 Routine Maintenance................................................................................................................. 25
8.2.1 Daily.................................................................................................................................... 25
8.2.2 Weekly (or every 40 hours of operation)............................................................................ 25
8.2.3 Monthly............................................................................................................................... 25
8.2.4 Yearly ................................................................................................................................. 26
8.3 Adjustments............................................................................................................................... 26
8.3.1 Table Position Adjustment.................................................................................................. 26
8.3.2 Belt Tightness Adjustment.................................................................................................. 26
8.4 Drill Head Replacement............................................................................................................. 27
8.4.1 Side Head Bearing Replacement....................................................................................... 27
8.4.2 Center Head Bearing Replacement ................................................................................... 28

1.0 Introduction
4
8.5 Hydraulic ....................................................................................................................................28
8.5.1 Recommended Oils ............................................................................................................28
9.0 Parts Lists & Schematics................................................................................................................30
9.1 Main Assembly –Front View –A-5846-10 Sh’t. 1 of 5 Rev. A ..................................................30
9.2 Main Assembly –Front View –A-5846-10 Sh’t. 1 of 5 Rev. D ..................................................32
9.3 Main Assembly –Upper Right View –A-5846-10 Sh’t. 2 of 5 Rev. A........................................34
9.4 Main Assembly –Lower Right View –A-5846-10 Sh’t. 3 of 5 Rev. A........................................36
9.5 Main Assembly –Top View –A-5846-10 Sh’t. 4 of 5 Rev. A.....................................................37
9.6 Main Assembly –Top View –A-5846-10 Sh’t. 4 of 5 Rev. B.....................................................38
9.7 Main Assembly –Top View –A-5846-10 Sh’t. 4 of 5 Rev. C.....................................................39
9.8 Main Assembly –Wiring Detail –A-5846-10 Sh’t. 5 of 5 Rev. A ...............................................40
9.9 Main Assembly –Wiring Detail –A-5846-10 Sh’t. 5 of 5 Rev. B ...............................................41
9.10 Power Panel Assembly –Wiring Detail –EE-3256 Rev. C......................................................42
9.11 Power Panel Assembly –Wiring Detail –EE-3256-1 Rev. B ..................................................44
9.12 Main Assembly –Hydraulic Power Unit –16541-3 Rev. A......................................................46
9.13 Hydraulic Power Unit Assembly –H-356-4 Rev. B..................................................................48
9.14 Hydraulic Power Unit –H-372-5...............................................................................................49
9.15 R.H. Spindle Block Assembly A-5847-1-6R Rev. B.................................................................50
9.16 L.H. Spindle Block Assembly A-5862-1-6R Rev. B..................................................................51

2.0 Safety
5
2.0 Safety
2.1 Precautions
This machine is designed for one-person operation. Never operate the machine with more
than one person.
Safe use of this machine is the responsibility of the operator. Use good judgment and
common sense when working with and around this machine.
Read and understand all instructions thoroughly before using the machine. If questions
remain, contact the dealer from which you purchased this machine. Failure to understand the
operating instructions may result in personal injury.
Only trained and authorized people should operate this machine.
Do not alter safety guards or devices. They are for your protection.
Disconnect power before cleaning or performing maintenance. See Section 2.2 Power
Lockout Procedure.
Observe all caution labels on this machine.
High Speed Drill - Keep rags, loose clothing and long hair away form rotating drill. Personal
injury could result from items being caught on drill.
Keep foreign objects off table and away from drill.
Be extremely careful when handling and changing the drills. Severe lacerations or
dismemberment could result from careless handling procedure.
ALWAYS WEAR SAFETY GLASSES when operating the drill machine.
Keep the floor around the machine free of trim, debris, oil and grease.
If the machine sounds or operates abnormally, turn it off and consult the Trouble Shooting
section of this manual. If the problem cannot be corrected, have it checked by a qualified
service person or your Authorized Challenge Dealer.
Have your electrician make sure the machine is properly grounded and that there is sufficient
power to operate the machine properly.
CRUSH HAZARD, keep feet off the pedal when handling paper under the clamp. DO NOT
REST FOOT ON PEDAL at any time!
DO NOT REACH UNDER THE DRILL AND CLAMP AREA!
DO NOT OPERATE WITH ANY GUARDS REMOVED! Replace all guards after adjusting,
lubricating or servicing the machine.
Severe Lacerations - Contact with high-speed drill could cause severe injury. Always turn
machine off and wait for drill to stop before removing drill bits. Keep hands away from drill(s)
when operating.
When replacing hydraulic parts, loosen the connections slowly to release pressure. Never
loosen connections with the machine running.
2.2 Power Lockout Procedure
For maximum safety when making adjustments or repairs to your machine, be sure to UN-PLUG the
power cord from the wall socket. For added safety –coil the cord up so that the plug is in view at all
times by the person servicing the machine.

2.0 Safety
6
2.3 Warning Label Definitions
The following warning labels are found at various locations on your machine. Read and understand
the meaning of each symbol. If a label is lost from the machine, it should be replaced
HAZARDOUS AREA
Disconnect power before cleaning, servicing, or making adjustments not requiring
power. Do not alter safety guards or devices; they are for your protection. Replace
all guards. Do not operate with any guards removed.
SHOCK HAZARD
Disconnect power before removing cover. Replace cover before operation.
SHOCK HAZARD
Disconnect power before removing cover. Replace cover before operation.
SINGLE OPERATOR
Do not operate with more than one person.

3.0 Specifications
7
3.0 Specifications
Description
Inch Units
Metric Units
Number of Drill Heads
3
Drill Diameters
13 sizes from 1/8” to 1/2”
3-13mm
Range between Drills
2-3/4” to 4-1/2”
7cm to 11cm
Range between Outside Drills
5-1/2” to 9”
14cm to 23cm
Maximum Drilling Capacity
2-1/2”
63mm
Backgauge Adjustment Range
0 to 5”
0 to 13cm
Auto Trip Backgauge (optional)
0 to 4-1/2”
0 to 11cm
Vertical Adjustment of Ind. Heads
1/4”
6mm
Adjustable Range (to side guide)
0 to 14”
0 to 37cm
Dimensions
Table Size
19-1/2” x 31-1/2”
50cm x 80cm
Table Height
37”
94cm
Overall Height
59-1/4”
151cm
Floor Space Required
36” x 41-1/2”
91cm x 105cm
Net Weight (@)
525lbs
236kg
Shipping Weight (@)
570lbs
257kg
Electrical
208/230 Volts (+/-10%)/18Amps, 1 phase, 50/60Hz, AC. Service size: 30Amps.
Challenge reserves the right to make changes to any product or specification without notice and
without incurring responsibility to existing units.

4.0 Installation Guide
8
4.0 Installation Guide
Refer to Figure 1on this page as well as the parts lists and drawings in the back of this manual for
part identification and orientation, if necessary.
All guards and instruction plates are installed for your safety and information and must remain on the
machine as shipped from the factory.
Figure 1

4.0 Installation Guide
9
4.1 Uncrating the Paper Drill
This machine is shipped on a wooden skid and is enclosed with a protective corrugated cover. It is
held onto the skid with plastic straps. Remove the straps and carefully cut the corrugated cover down
the side and unwrap it from around the machine. The table, backgauge, and other accessories are
packed in separate boxes and are secured to the machine. Remove these and carefully position the
machine on the floor. Immediately after uncrating, check off parts received against the packing list.
Also, examine for any physical signs of damage incurred during shipping. The machine is inspected
before and after it is crated at our plant. The responsibility for filing a claim against the carrier for
damages incurred during shipment rests with the receiver of goods (FOB our factory).
Clean all parts with a commercial cleaning solvent before installing or using the machine.
4.2 Installing the Table and Backgauge
Locate the four (4) table mounting bolts, washers, & nuts shipped in the backgauge box. Set the
table assembly in place and attach using the hardware as shown in Figure 2, but leave the hardware
loose.
Figure 2
4.2.1 Using Standard Backgauge:
Attach the backgauge assembly to the table and set both sides to the 6-5/8” position (as shown in
Figure 3 on page 10). Next, position the table so that the back surface of the backgauge comes in
contact with the front of each pull down shaft (Figure 4 on page 10). Now tighten the front two table-
mounting screws. Then move the backgauge forward and tighten the rear two screws.

4.0 Installation Guide
10
Figure 3
Figure 4
4.2.2 Using Auto-Trip Backgauge:
Attach the backgauge assembly to the table and set both sides to the 6” position (as shown in Figure
5). Next, position the table so that the front surface of the backgauge is 1-7/8” from the front of each
pull down shaft (see Figure 5). Now tighten the front two table-mounting screws. Then move the
backgauge forward and tighten the rear two screws.
Figure 5
Pull Down Shaft
Ruler set to 1-7/8”
Pull Down
Shaft
Backgauge
set to 6”

4.0 Installation Guide
11
Note: Further adjustments may be necessary once the machine is ready to drill. See Table Position
Adjustment (See section 8.3.1 on page 26).
4.3 Installing the Drill Blocks and Drills
Always handle drills with care to avoid severe lacerations. Even dull drills
are sharp enough to cause lacerations.
Place the drill block knock-outs in position (refer to Figure 1 if necessary). Now set the three drill
blocks place. Check to see if the blocks are flush with the table. Place shims under the blocks if
necessary.
Insert the tapered head of the hollow drills into the spindles. Be sure that the drift hole covers are in
place before operating the machine (Figure 1). The drift hole covers prevent paper chips from flying
out while drilling.
4.4 Hydraulic Level Check
Check the level of the oil in the hydraulic reservoir. This check is made by first removing the louvered
panel at the left side of the stand (two screws hold it in place) and locating the breather cap on the top
of the reservoir. The breather cap has a dip stick attached for checking the oil. When screwed in
(and then removed to check) there should be approximately an 1/8” (3 mm) of oil on the stick. Some
machines are equipped with a clear reservoir in which case the oil level can be checked by visually
inspecting the oil level. There is a full level line marked on the reservoir. Recommended oils are
found in the maintenance section of this manual (page 23).
4.5 Hooking up the Power Line
Always disconnect the power when cleaning, servicing, or lubricating your
drill, see Lock Out Procedures, page 5.
This EH-3D is factory wired for 230 Volts, single phase, 50/60Hz and is supplied with a power cord
with a NEMA ‘L6-30P’ plug. It is the customer’s responsibility to have a NEMA ‘L6-30R’ receptacle
wired by a licensed electrician to a 30 Amp circuit (minimum). If your location requires this machine to
run on 208 Volts, a qualified technician should open the power panel cover and move the jumper that
is located in the terminal block from 11 and 11A to 11 and 11B. Replace the power panel cover
before plugging the machine into the wall socket.
IMPORTANT: Select the proper voltage link to match the voltage supplied to the machine
(Figure 6).
Figure 6

4.0 Installation Guide
12
4.6 Installing the Chip Container
The chip container is installed by slipping it over the two hooks provided on the rear of the machine.

5.0 Operation
13
5.0 Operation
5.1 Starting the Machine
The power for this machine is supplied by two motors; one is for the hydraulic power pack, the other
is for the spindle. They are both started and stopped simultaneously by a single set of start-stop
buttons located on the stand under the table (Figure 1 on page 8). Be sure both motors are operating
before trying to drill paper.
5.2 Operating the Drill
Always wear safety glasses when operating this machine.
Pressing down on the foot switch activates the hydraulic unit, which brings the drill heads (and drills)
down to the table. When the drills reach the bottom of their stroke, they will automatically return the
“up” position. (Note: The vertical stroke of the drills must be set before drilling to provide the proper
drill depth. See section 5.3 on page 13 for adjustment procedures). The pedal must be released
and depressed again before drilling the next set of holes, assuring full control and allowing no repeat
stroke. By releasing the pedal, the operator can stop the drills in their downward stroke at any time
allowing them to return to their normal position, thus preventing costly errors. NEVER REST YOUR
FOOT ON THE PEDAL WITHOUT INTENDING TO BRING DOWN THE DRILLS!
5.3 Adjusting the Vertical Stroke
The vertical stroke of the machine determines the exact depth the drills will reach at the bottom of
their stroke. Whenever installing a new set of drills, the vertical stroke must be adjusted before
drilling.
The two outside heads are provided with independent height adjustment while the center head works
from the center overall adjusting screw. This is necessary because of the variance in length of the
drills. Start by adjusting the center head to its highest point. This is accomplished by turning the drill
depth adjustment screw (Figure 1 on page 8) counterclockwise until it stops turning. Then adjust the
side heads all the way up by turning the knurled ring on the heads clockwise (use the provided drill
drift in the holes if necessary). Now, with the new drills in the place, put two or three sheets of paper
under the heads. The center spindle should then be adjusted so that the center drill just cuts through
the paper. Too deep will cause a ragged hole in the bottom sheets as well as a shorter drill life from
drilling into the cutting block. After the center drill is adjusted, each outside spindle can be adjusted.
Turn counterclockwise to lower and clockwise to raise. No locking is necessary. Once all three drills
are set, drill through a full lift of paper. A final adjustment of the drill depth adjusting screw may be
necessary to obtain the best results.
5.4 Setting the Distance between Drill Heads
This machine incorporates three drilling heads operating on three belt-driven spindles. The center
head is stationary while the two outside heads have a lateral adjustment of 1-3/4” each.
This provides an adjustment range of 2-3/4” to 4-1/2” (7 cm to 11 cm) between the center drill and
either of the outside drills, or a range of 5-1/2” to 9” (14 cm to 23 cm) between the two outside drills.
The lateral adjustment is accomplished by loosening the clamp knob (a black, plastic hand knob)
located at the rear of each outside head, and then turning the 4-lobed, black knob located at the

5.0 Operation
14
outside of each head. This moves the heads along a shaft. A scale and pointer located at the front of
the heads gives a reading in inches and millimeters of the center-line relationship to the center head.
When a setting is made, make certain that the clamp knob is tightened again.
Any combination of three heads can be used, that is one, two, or three holes may be drilled if desired.
It is recommended, however that no more than two half inch hollow drills be used at the same time.
5.5 Setting the Backgauge Position
The backgauge position is adjusted by first loosening the two thumb screws under the table. This will
allow the backgauge to move freely. Then use the two scales on the top of the table to set the
backgauge to the desired position. The scales read in inches and millimeters and will give the
distance from the edge of the sheet to the center of the holes. Be sure the 1” (2.5 cm) square pieces
mounted to the backgauge are aligned on top of the scales to provide the proper reading (Figure 1 on
page 8). Tighten the thumbscrews when finished.
5.6 Using the Side Guide
To adjust the position of the side guide, loosen the two black knobs until the side guide is free to slide
sideways. Slide the side guide to the desired position and then tighten the two knobs. For certain
hole positions, it may be necessary to remove the rectangular spacer from the side guide assembly
(Figure 7).
Figure 7
5.7 Adjusting the Stroke Speed
The hydraulic unit is equipped with an adjustable valve for regulating the speed on the drill stroke (up
and down travel). Soft stocks such as mimeographs, etc., are apt to wrinkle at high speeds, and the
speed should be set to a point where the best results are obtained.
This adjustment is made by turning the adjustable valve (located on the right side of the drilling
machine stand) counterclockwise to reduce speed and clockwise to increase speed (Figure 8 on
page 15).

5.0 Operation
15
Figure 8
5.8 Removing the Cutting Blocks
Each cutting block is removed by inserting your fingers in the hole provided in the frame (under the
table) and pushing up on the cutting stick knock out. There are three holes: one on each side of the
frame and one in the front.
5.9 Removing the Drills from the Spindle
Remove the drift hole cover from the spindle to expose the drift hole. Then, with the flat side down,
insert the drill drift into the hole and lift upward. The upward movement forces the drill down and
releases it from the spindle.

6.0 Drilling Tips
16
6.0 Drilling Tips
Important! To prevent the drill from overheating, always avoid drilling too slowly. The drill stroke
speed should be set at the fastest speed possible that still allows the drills to cut easily through the
paper.
Slotted Holes - Instead of punching slotted holes for five and seven hole universal binding work,
save time and cost by drilling a 1/2” (1.3 cm) diameter hole in place of the slot. The slot is only
intended to allow the post or ring to be used in either location, and the large hole permits this.
Plastic Bindings - Drilling holes for plastic bindings, instead of punching them, is practical and saves
a great deal of time, particularly on long run jobs.
Keep Drills Sharp - A dull drill is the major cause of drill breakage and production tie-ups. Usually
after three hours of drilling, depending on the type of paper being processed, the drill should be
sharpened. A dull drill results in poor quality work.
Keep Drills Clean - A dirty and rusty drill will not permit the free upward passage of the drill chips.
Pressure built up by a clogged drill will split or break the drill. To keep it free from dirt or rust, clean
the drill of all chips after each use and apply a light oil to the inside and outside. Drills should be
cleaned out immediately after each use. This is particularly true if a coated or varnished stock has
been drilled. On these jobs the coating on the chips frequently fuse the chips into one solid mass
when the drill cools, causing breakage the next time the drill is used.
Lubricate Drills - Lubrication assists in the passage of the chips and helps avoid overheating of the
drills. Use readily available stick lubricants for this purpose. Hold the end of the stick against the side
of the rotating drill. Be sure to touch the cutting edge with the lubricant also. Wipe off excess oil
before drilling. CARE MUST ALWAYS BE TAKEN WHEN HANDLING DRILLS.
Keep Spindle Clean - Clean out the drill spindle frequently. This will prevent any buildup in the
spindle of the drill.
Set the Drills Correctly - Do not cut too deeply into the cutting block. The drill should just touch the
block and cleanly cut through the bottom sheet. During drilling, do not set the drill deeper into the
block but change the position of the block frequently. Drilling deeper into the block dulls the drills
quickly. Use a piece of chipboard underneath your stock. This will make handling the stock easier
and will ensure that the last sheet is cut cleanly through.
Check for Drill Wobble - If spindles are badly worn or bent through mis-adjustment, have them
replaced immediately. A wobbly or loosely held drill can break.
Check Your Drill Sharpener - The cutting edge of the sharpening bit should be inspected frequently
to make certain that it is sharp and free of nicks. Never let a drill drop onto the sharpening bit. It will
chip the sharpening edge. Use gentle pressure when sharpening - let the sharpening bit do the work.
Carefully check the sharpness of the drill after sharpening. The cutting edge should be razor sharp.
Check Belt on the Drilling Machine - The belt should be kept tight to assure proper speed of the
drill. When the drill slows down, it acts more like a punch, which results in poor quality work and drill
breakage.
Just a little time and effort taken with each use of your paper drilling machine should result in trouble
free operation over many years.

7.0 Accessories for Challenge Paper Drilling Machine
17
7.0 Accessories for Challenge Paper
Drilling Machine
7.1 Genuine Challenge Hollow Drills
In 13 Standard Sizes For Every Drilling Need
All drills carried in stock by local Challenge dealers (17/32” & 9/16” available by special order).
Hollow Drills
Diameter x Drill Capacity
Cat. No.
1/8” x 5/8” (3.2 x 16mm)
CD-2-3
5/32” x 11/8” (4 x 29mm)
CD-52
3/16” x 15/8” (4.8 x 41mm)
CD-3
7/32” x 2” (5.6 x 51mm)
CD-72
¼” x 2” (6.3 x 51mm)
CD-4
17/64” x 2” (6.7 x 51mm)
CD-174
9/32” x 2” (7.1 x 51mm)
CD-92
5/16” x 2” (7.9 x 51mm)
CD-5
11/32” x 2” (8.7 x 51mm)
CD-112
3/8” x 2” (9.5 x 51mm)
CD-6
13/32” x 2” (10.3 x 51mm)
CD-132
7/16” x 2” (11.1 x 51mm)
CD-7
½” x 2” (12.7 x 51mm)
CD-8
Special order drills:
17/32” x 2” (13.5 x 51mm)
CD-172
9/16” x 2” (14.3 x 51mm)
CD-9
Teflon Coated Hollow Drill Bits
Diameter x Drill Capacity
Cat. No.
1/8” x 5/8” (3.2 x 16mm)
TCD-2-3
5/32” x 11/8” (4 x 29mm)
TCD-52
3/16” x 15/8” (4.8 x 41mm)
TCD-3
7/32” x 2” (5.6 x 51mm)
TCD-72
¼” x 2” (6.3 x 51mm)
TCD-4
17/64” x 2” (6.7 x 51mm)
TCD-174
9/32” x 2” (7.1 x 51mm)
TCD-92
5/16” x 2” (7.9 x 51mm)
TCD-5
11/32” x 2” (8.7 x 51mm)
TCD-112
3/8” x 2” (9.5 x 51mm)
TCD-6
13/32” x 2” (10.3 x 51mm)
TCD-132
7/16” x 2” (11.1 x 51mm)
TCD-7
½” x 2” (12.7 x 51mm)
TCD-8

7.0 Accessories for Challenge Paper Drilling Machine
18
7.2 Challenge Drill-Ease Lubricant Stick
Cat. No. 4688
This lubricating stick provides a dry stainless lubricant which has many uses throughout the printing
plant. It is specially recommended for use on hollow drills for easier drilling, particularly when drilling
clay-coated stock. It eliminates binding and excessive heating of the drill. Will not discolor the stock.
CARE MUST ALWAYS BE TAKEN WHEN USING STICK AND HANDLING DRILLS.
7.3 Challenge Drilling Blocks
Cat. No. KK-473-3
These Challenge 3” End-Wood Drilling Blocks are for round hole drilling operations. Sold in
packages of 12.
7.4 Handi-Sharp Drill Sharpner
Cat. No. 57100
Replacement Cutting Bit Part No. 6469
Adapter for other style drill bits Part No. 57114
7.5 Hollow Drill Sharpener
For fast, easy drill sharpening
Drills are sharp even after use. Be careful to keep edge away from your
body. To prevent personal injury and/or damage to the drill, ALWAYS keep drills in protected area.
7.5.1 Using the Chip Remover
Figure 9 –cut-away view
1. CAREFULLY place a hollow drill in the holder section as shown, and insert the holder (with
drill) into the chip remover end as shown.
2. Firmly tap the entire assembly on a solid surface to remove the chips from the hollow drill.
7.5.2 Using the Drill Sharpener
Figure 10 –cut-away viewFigure 11

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Figure 12
1. CAREFULLY place a hollow drill in the holder section as shown, and insert the holder (with
drill) into the sharpener end as shown. Be very careful to bring the drill and cutting tool
together with out bumping. The cutting tool is made of GLASS HARD material and may
be chipped.
2. USE CLOCKWISE ROTATION while maintaining an even pressure, until the hollow drill is
sharpened (usually two or three turns). The cutting tool seldom requires replacing, but when
it does become necessary, the bit can be ordered through your Challenge Dealer (Cat. No.
4952).
Challenge Hollow Drill Sharpener Part No. A-4950
Extra Cutting Bit Part No. 4952
7.6 Right Side Guide Kit
Cat. No. K-5731
This kit includes all of the parts and hardware necessary to add a right-hand sideguide to your
existing backguage. When used in conjunction with the left-hand sideguide, multiple hole patterns
can be drilled by shifting the stock from one sideguide to the other between drilling cycles. (See
Figure 13 on page 19.)
Figure 13
7.7 Auto-Trip Backgauge
Cat. No. A-4615-9
Figure 14

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This optional backgauge assembly provides additional versatility to the EH-3D. The automatic trip on
the side guide permits step and repeat type of operation with a minimum distance between holes of
3/8” (9.5 mm) with the standard stops or 1/4” (6.3 mm) minimum by the use of a fixed gage, available
as optional equipment.
As each set of holes is drilled, the side guide is automatically tripped, and as soon as the drills clear
the stock on their up stroke, the guide is free to move to its next stop. This is accomplished by
pushing the stock to the left and moving the guide at the same time. When drilling one, two or three
holes only, that fall within the 9” (23 cm) limitations of the machine, the automatic trip bracket (located
at the left of the machine) can be turned so that it does not engage the trip lever.
7.7.1 Setting the side guide stops
First set the rear gage to the desired back margin. Be sure both sides are set to the same dimension
and tighten the two thumbscrews. Next, remove the guide shaft and set the guide stops to the
desired distance between holes (a scale in the guide shaft is provided for this purpose). The guide
shaft is then replace in the rear gage and final adjusting or centering of holes is accomplished with
the knurled screw at the extreme left end of the guide shaft.
The automatic trip gage comes equipped with seven stops. Additional stops can be purchased at a
very nominal price. Challenge fixed index gages are recommended where the same job is to be
handled over and over again. They are easily and quickly attached and removed. NOTE: When
drilling narrow strips, the side guide roller assembly should be mounted on the inside of the side
guide assembly.
7.8 Fixed Gages
For Fast, Accurate Hole Spacing
(For use with optional auto-trip backgauge only)
Figure 15
These fixed gages with pre-cut hole spacings fit on the side guide in place of the moveable stops. To
use, position the gage so that the right end lines up with the dimension on the scale for the centerline
of the first hole to be drilled. Use of the stops on fixed gages is the same as using the adjustable
stops.
In addition to 2-5 hole patterns, fixed gages are available from stock in the following standard types:
22-stop gage, 1/2” centers for multi-ring binders
25-stop gage, 3/8” centers
25-stop gage, 1/4” centers
34-stop gage, 1/2” centers
46-stop gage, 3/8” centers