Clarke METALWORKER CDP401B Installation and operation manual

GC0110
16mm DRILL PRESS
Model Nos CDP401B & CDP451F
Part No 6505570 & 6505580
OPERATING & MAINTENANCE
INSTRUCTIONS
OPERATING & MAINTENANCE
INSTRUCTIONS

2
INTRODUCTION
Thank you for purchasing this CLARKE Drill Press.
Before attempting to operate the machine, it is essential that you read this
manual thoroughly and carefully follow all instructions given. In doing so you
will ensure the safety of yourself and that of others around you, and you can
also look forward to the product giving you long and satisfactory service.
GUARANTEE
This CLARKE product is guaranteed against faulty manufacture for a period of
12 months from the date of purchase. Please keep your receipt as proof of
purchase.
This guarantee is invalid if the product is found to have been abused or
tampered with in any way, or not used for the purpose for which it was
intended.
Faulty goods should be returned to their place of purchase, no product can
be returned to us without prior permission.
This guarantee does not effect your statutory rights.
ENVIRONMENTAL PROTECTION
Do not dispose of this product with general household waste. All tools,
accessories and packaging should be sorted, taken to a recycling
centre and disposed of according to the laws governing Waste
Electrical and Electronic Equipment.
PARTS & SERVICING
For parts & servicing, please contact your nearest dealer, or
CLARKE International, on one of the following numbers.
PARTS & SERVICE TEL: [phone]
PARTS & SERVICE FAX: [phone]
or e-mail as follows:
PARTS: [email protected]
SERVICE: [email protected]

3
CONTENTS
Introduction ............................................................................................ 2
Guarantee .............................................................................................. 2
Environmental Protection ...................................................................... 2
Parts & Service Contacts ....................................................................... 2
General Safety Rules ............................................................................. 4
Additional Safety Rules for Drill Presses ............................................... 6
Electrical Connections .......................................................................... 7
Machine layout ...................................................................................... 8
Unpacking .............................................................................................. 9
Assembly .............................................................................................. 10
Useful Accessories ............................................................................... 14
Settings & Adjustments ........................................................................ 15
Operation ............................................................................................. 17
Machine Speed Table ......................................................................... 20
Drilling Speeds ..................................................................................... 21
Maintenance ........................................................................................ 22
Troubleshooting .................................................................................... 23
Technical Specification ....................................................................... 25
Parts List and Diagrams ....................................................................... 26
Declaration of Conformity .................................................................. 31

4
GENERAL SAFETY RULES
GENERAL SAFETY IN THE WORKPLACE
1. ALWAYS ensure that air can circulate around the machine and that the air
vents are unobstructed.
2. ALWAYS keep work area clean & tidy. Cluttered work areas and benches
invite accidents.
3. NEVER over-reach. Keep proper footing and balance at all times.
4. NEVER use or store equipment in a wet/damp environment or expose to
rain.
5. KEEP children and bystanders at a safe distance from work area.
6. NEVER operate a machine when under the influence of alcohol, drugs or
medication.
7. ALWAYS ensure the workplace is well lit. Ensure that lighting is placed so
that you will not be working in your own shadow.
CARE & USE OF THE EQUIPMENT
1. ALWAYS check for any damage or any condition that could affect the
operation of the machine. Any damaged part should be properly
repaired.
2. NEVER remove the cover panel unless the machine is disconnected from
the supply, and never use the machine with cover panels removed.
3. NEVER attempt any electrical or mechanical repair unless you are a
qualified technician. If you have a problem with the machine contact
your local CLARKE dealer.
4. NEVER use this product for any other purpose than that described in this
booklet.
5. NEVER abuse the mains cable by yanking the cable to disconnect it from
the socket. Keep the cable away from sharp edges/hot surfaces.
6. NEVER stand on the machine. Serious injury could occur if the machine
topples over.
7. Avoid accidental starting by making sure the power switch is off before
plugging in the power cable.
8. Never leave the machine running unattended until it has come to a
complete stop.
PROTECTIVE CLOTHING
1. Dress properly. Loose clothing, gloves, neckties, rings, bracelets, or other
jewellery may get caught in moving parts. Non-slip footwear is
recommended. Long hair should be tied back.

5
2. ALWAYS wear safety glasses. Everyday glasses are not safety glasses.
3. Wear a face mask if drilling into any material which produces dust.
CARE OF POWER TOOLS
1. Know your machine. Read the manual carefully. Learn the machines
applications and limitations, as well as the specific potential hazards
peculiar to it.
2. ALWAYS keep the guards in place and in working order.
3. Remove any adjusting keys or wrenches before starting. Form the habit of
checking to ensure that keys, wrenches and tools are removed from the
machine.
4. Don’t force the machine. It will do the job better and safer, at the rate for
which it was designed.
5. Use the correct tool. Don’t force a tool or attachment to do a job for
which it was not designed.
6. ALWAYS maintain tools in top condition. Keep drills sharp and clean for
best and safest performance. Follow instructions for lubricating and
changing accessories.
7. ALWAYS disconnect the machine from the power supply before carrying
out any servicing or changing of accessories.
8. CHECK for any damage before use. Damage to moving parts or major
components should be inspected by a qualified technician before
operating the machine. Contact your local dealer for advice.
WARNING: AS WITH ALL MACHINERY, THERE ARE CERTAIN HAZARDS
INVOLVED WITH THEIR OPERATION AND USE. EXERCISING RESPECT AND
CAUTION WILL CONSIDERABLY LESSEN THE RISK OF PERSONAL INJURY.
HOWEVER, IF NORMAL SAFETY PRECAUTIONS ARE OVERLOOKED, OR
IGNORED, PERSONAL INJURY TO THE OPERATOR, OR DAMAGE TO
PROPERTY MAY RESULT.

6
ADDITIONAL SAFETY RULES FOR DRILL PRESSES
1. IMPORTANT: You should not operate this machine unless you are
thoroughly familiar with drilling machines and drilling techniques. If there is
any doubt whatsoever you should consult a qualified person.
2. NEVER operate the machine until it is completely assembled and you
have read and understood this entire manual.
3. ALWAYS use clamps, or a drill vice bolted to the table, to hold the work. It
should never be held in bare hands.
4. ALWAYS shut off the power and remove the drill bit before leaving the
machine,
5. ALWAYS make all adjustments with the power OFF.
6. ALWAYS use the correct drilling speeds for the drill size and the type of
material being drilled (see page 21).
7. NEVER leave the drill unattended whilst it is running. Turn the machine OFF
and do not leave until it has come to a complete stop.
8. ALWAYS remove and store the drill bits when you have finished with the
machine.
9. CAUTION: This machine is designed for use with drill bits and morticing
attachments only. The use of other cutting tools or accessories could be
hazardous.
10. NEVER attempt to drill into a workpiece that does not have a flat surface
unless a suitable support is used.
11. ALWAYS stop the drill before removing workpieces, work supports or swarf
from the table.
12. ALWAYS Make sure you remove the chuck key before turning the machine
on.
13. Adjust the table or depth stop to avoid drilling into the table surface.
14. ALWAYS be sure that the drill bit is securely locked in the chuck.
15. NEVER assemble or set up any work on the table while the drill is running.
16. ALWAYS ensure the table lock is tight before starting the drill.
17. ALWAYS keep hands and fingers away from the drill bit.
WARNING: DUST GENERATED FROM CERTAIN MATERIALS CAN BE
HAZARDOUS TO YOUR HEALTH. ALWAYS OPERATE THE MACHINE IN A
WELL VENTILATED AREA. USE A DUST COLLECTION SYSTEM WHENEVER
POSSIBLE.

7
ELECTRICAL CONNECTIONS
Connect the mains lead to a standard, 230 Volt (50Hz) electrical supply
through an approved 13 amp BS 1363 plug, or a suitably fused isolator switch.
WARNING! THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in the mains lead are coloured in accordance with the
following code:
Green & Yellow .......... Earth
Blue .......... Neutral
Brown .......... Live
As the colours of the flexible lead of this appliance may not correspond with
the coloured markings identifying terminals in your plug proceed as follows:
• Connect GREEN & YELLOW cord to plug terminal marked with letter
“E” or Earth symbol “ ”, or coloured GREEN or GREEN & YELLOW.
• Connect BROWN cord to plug terminal marked letter “L” or
coloured RED.
• Connect BLUE cord to plug terminal marked letter “N” or coloured
BLACK.
If this appliance is fitted with a plug which is moulded onto the electric cable
(i.e. non-rewirable) please note:
1. The plug must be thrown away if it is cut from the electric cable. There is a
danger of electric shock if it is subsequently inserted into a socket outlet.
2. Never use the plug without the fuse cover fitted.
3. Should you wish to replace a detachable fuse carrier, ensure that the
correct replacement is used (as indicated by marking or colour code).
4. Replacement fuse covers can be obtained from your local dealer or most
electrical stockists.
5. The fuse in the plug must be replaced with one of the same rating (13
amps) and this replacement must be ASTA approved to BS1363.

8
MACHINE LAYOUT

9
UNPACKING
When unpacking, check for damage or omissions etc. Any found should be
reported to your CLARKE dealer where the machine was originally
purchased. Do not discard the packaging until the machine is assembled.
To protect the machine parts from moisture, a protective coating has been
applied to the outside surfaces. Remove this coating with a soft cloth,
moistened with kerosene. Do not use acetone, gasolene or thinners for
cleaning. Apply a coat of paste wax to the table to prevent surface
corrosion and column and then wipe all parts with a clean, dry cloth.
The machine is delivered with the following components:
A Table Assembly E Base
B Column assembly with table support F Head Assembly
C Instruction manual (this document) G Box of loose parts
D Bag of loose parts H Chuck Guard Assembly

10
WARNING: IF ANY PART IS MISSING OR DAMAGED, DO NOT PLUG THE
MACHINE IN UNTIL THE MISSING OR DAMAGED PART IS REPAIRED OR
REPLACED AND ASSEMBLY IS COMPLETE.
TOOLS NEEDED FOR ASSEMBLY
• Adjustable wrench or socket set
• Cross-head screwdriver
• Hammer and block of wood
INSTALLING THE BASE AND COLUMN
NOTE: Ideally, the base should be firmly bolted
to the floor or workbench, prior to assembly of
other components. The mounting surface must
flat, level and capable of supporting the ma-
chines weight. The machine should be securely
fastened through the mounting holes to a stand
or floor with heavy-duty fasteners (not supplied).
This will prevent the machine from tipping over,
sliding, or walking during operation.
1. With the base on a flat level surface, bolt on
the column using the 4 x M10 Hex head bolts
(1) provided and tighten them fully.
Fig 1
ASSEMBLY
ITEMS SUPPLIED LOOSE IN THE BAG OR BOX

11
2. Carefully locate the table in its support
and nip up with the table clamping
handle (Fig.2).
3. Fit the table crank to the drive spigot.
4. Screw the arm locking handle into place
on the rear of the column support.
DRILL PRESS HEAD TO COLUMN
CAUTION: THE HEAD ASSEMBLY IS HEAVY. TO AVOID ACCIDENT, TWO
PEOPLE SHOULD LIFT IT INTO POSITION.
1. Carefully lift the head assembly and
position it with its mounting opening over
the column. Swivel the assembly to
ensure it is seated correctly on the
column.
NOTE: It may be necessary to unscrew the
head locking set screws (A in Fig 2)
slightly to ensure they do not protrude
internally so as to prevent the head from
sliding fully into position.
2. Align the drill press head with the
direction of the base.
3. Tighten the set screws using an allen key.
FEED HANDLES
1. Screw the three feed handles into the threaded holes in the feed hub and
tighten by hand.
NOTE: When using the drill, one or two of the feed
handles may be removed if an unusually-
shaped workpiece interferes with handle
rotation.
CHUCK GUARD ASSEMBLY
NOTE: This operation should be carried out before
the chuck is installed if the guard cannot be
passed over the chuck.
Slide the Chuck Guard over the Quill Shaft, turn it so
that the pinch bolt faces the front, then nip up the
pinch bolt to temporarily secure it in this position.
IMPORTANT: Ensure the Quill Shaft/Spindle is at the
top of it’s travel.
Fig 2
Fig 3
Fig 4

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PULLEY COVER KNOB
Locate the knob, with pan head screw and attach to the cover, screwing on
tightly.
FITTING THE DRIVE BELTS
1. Undo the Belt Tension
locking screws (one
either side of the head
- A Fig. 5), and turn the
Belt Tension Lever (B -
Fig. 5), clockwise to
bring the Motor Pulley
closer to the Spindle
Pulley which will allow
the belts to be slipped
on with ease.
2. Lightly grease the Idler
Pulley Pivot shaft and
locate the Idler pulley
assembly in it’s mounting between the motor and spindle pulleys.
3. Consult the chart inside the belt cover (duplicated on page 19), and fit
the belts in the position corresponding to spindle/drill speed required.
4. Turn the Belt Tension Lever ant-clockwise so that tension is applied to the
belts. Tension is correct when the belts deflect by approx. ½” at the centre
of their span when using reasonable thumb pressure. Lock the motor in this
position with the Locking Screw - A.
NOTE:
1. The idler pulley will ‘float’ so that tension is applied equally to both belts .
2.
If the belt should slip whilst drilling, adjust the belt tension.
CHECKING THE OPERATION OF THE MICROSWITCH
IMPORTANT:
When closing the cover, check the operation of the Microswitch. It is important that it
operates immediately the cover is pulled open, in order to prevent the machine from
operating........NOT when the cover is opened sufficiently for fingers to be inserted.
If necessary, bend the actuating tab, which is attached to the cover, to ensure this.
Fig 5

13
INSTALLING THE CHUCK
WARNING: DISCONNECT THE DRILL PRESS FROM THE POWER SOURCE
BEFORE INSTALLING, ADJUSTING, OR REMOVING THE CHUCK.
1. Slide the table up the column and
secure it to within 6" of the spindle.
2. Put a piece of scrap wood on to the
table to protect the chuck nose.
3. Ensuring all parts are thoroughly clean,
dry, and burr free, place the chuck over
the end of the arbour and pull the
spindle down using the feed handles,
pressing the chuck jaws hard against the
piece of scrap wood until the chuck is
forced home. (Fig 6).
4. Turn Chuck Guard through 180° and
tighten the pinch bolt.
CAUTION: TO AVOID DAMAGING THE CHUCK, MAKE SURE THE JAWS
ARE COMPLETELY RECESSED INTO THE CHUCK. DO NOT USE A METAL
HAMMER TO DRIVE THE CHUCK INTO THE SPINDLE.
REMOVING THE CHUCK
To remove the chuck, pull the spindle down fully, using the feed handles. The
slot in the side of the Quill will become visible, as shown in fig 7. Note the
position of the chuck, perhaps by placing a chalk mark, in line with the
chuck, on the column, then raise the table so that it is only an inch or so
below the position marked.
Place a thick cloth, or similar, on the table to
catch the chuck, to prevent damage when it
drops, then pull down the spindle once more,
until the slot in the Quill tube is visible. Insert
the drive wedge into the slot and give it a
sharp tap, preferably with a copper hammer.
This will break the seal between the quill tube
and the arbour, allowing the chuck to fall
free, on to the cloth on the table.
Fig 6
Fig 7

14
To disconnect the chuck from the arbour, give it a sharp tap with a soft head
mallet to break the taper seal.
NOTE: Morse taper drills (MT2), may also be used with this machine, and are
inserted into the quill to replace the arbour. Removal is the same as that for
removing the chuck.
ASSEMBLING THE ON/OFF SWITCH
Ensure the ON/OFF switch ‘Emergency OFF’
component is attached, as shown, using the two
screws supplied. Make sure the plastic cover is
properly in place before running the machine.
To turn the machine ON, lift the cover guard to
access the ON/OFF buttons. Press the green
push-button to start the machine.
• As a safety feature, the ON button cannot
be pressed without raising the guard.
To turn OFF, press either the OFF button if holding
the guard raised, or press the guard cover at any time.
Fig 8
USEFUL ACCESSORIES
The following range of accessories is available from your Clarke dealer:
Mortising Attachment CMA1B 6500023
Mortise Chisels 6mm 6500025
9mm 6500026
13mm 6500027
16mm 6500028
Drill Press Vices CDV30B 6501901
CDV40B 6501902
CDV50B 6501903
CDV60B 6501904
Table Clamps CVC6 6501920
CVC9 6501925
Drill Bit Tools table DBT1 6500230

15
SETTINGS AND ADJUSTMENTS
TABLE
The table may be raised, lowered or swivelled
about the column, by slackening off the table
support locking handle, (Fig 10), adjusting
accordingly using the table crank, and re-
tightening the locking handle.
If the table assembly moves stiffly when being
swivelled about the column, slacken the upper
collar grub screw (at the rack) to allow the collar
to move very slightly, thereby providing a little
more clearance between rack and collar. Tighten
the grub screw when satisfied.
The table may also be
turned on its axis by
slackening the pinch bolt
at its mounting
spigot,(Fig 2). Note that
the table will only turn
through an arc and will
eventually come into
contact with the
column. Take care not to
cause damage to the
column.
Tilt the table by loosening the Table Tilt Locking
Screw beneath the table, (Item 7, page 26), tilting
to the required position, & re-tightening the
screw.
A bevel scale is provided on the table mounting,
measured in degrees, to assist in setting the
required angle, (Fig 11). For all normal opera-
tions, the table should be set to 0°.
To check to ensure the table is entirely square to the drill, insert a piece of
straight round bar in thechuck, place a square on the table and bring it up to
the round bar. Adjust the table tilt, if necessary, so the table is correctly
aligned.
SPINDLE DEPTH
Located around the spindle feed shaft is a Depth Stop Collar, carrying a
graduated scale (A). The collar is capable of turning about the shaft, and
may be locked in place by a Locking Screw (B). The graduations are imperial
Fig 11
Fig 10
Fig 9

16
(inches) and metric (mm). To set a drilling depth:
1. With the power OFF, lower the drill bit so that it
contacts the work and hold in that position.
2. Slacken off the locking screw and turn the collar
so that the measurement for the depth of hole
required is in line with the pointer (C). Lock the
collar in this position using the locking screw.
The drill is now set to drill holes to your pre-deter-
mined depth, from that particular start point.
CHANGING DRILL (SPINDLE) SPEED
Before changing the speeds, ensure the machine is switched OFF, and
disconnected from the mains supply.
1 Undo the Belt Tension Locking Screws (A -Fig. 13), one either side of the
head, and turn lever B - Fig.13 clockwise to relieve any tension on the
belts. Referring to the chart inside the belt cover (which is duplicated on
page19), install the belts in the positions corresponding to the spindle
speed required.
2. Lever the motor, on its bracket,
away from the head, using the
lever B - Fig.13, so that tension
is applied to the belts.
NOTE: The idler pulley will ‘float’ so
that tension is equally applied to
both belts
Tension is correct, when the belts
deflect by approx. ½” at their
centre when using reasonable
pressure with the thumb and
forefinger.
Lock the motor in this position using the two Locking Screws (A - Fig. 13).
NOTE: If the belt should slip whilst drilling, adjust the belt tension.
Fig 12
Fig 13

17
OPERATION
1 . Insert the drill bit into the jaws of the chuck by approx 1", ensuring that the
jaws do not touch the flutes of the drill. Before tightening the chuck,
ensure that the drill is centred within the jaws.
WARNING: TO AVOID INJURY, MAKE SURE THAT THE CHUCK KEY IS
REMOVED FROM THE CHUCK BEFORE STARTING ANY DRILLING
OPERATION.
2. Ensure the table height and position is set so that drill travel is sufficient for
the job in hand.
3. Ensure the work is securely clamped, or held in a drill vice bolted to the
table. Never hold it with bare hands. Severe personal injury may be
caused if the workpiece is whipped out of the operator’s hand, and
damage to the machine incurred if the work strikes the column.
If the piece is of irregular shape and cannot be laid flat on the table, it
should be securely blocked and clamped.
Any tilting, twisting or shifting, results not only in a rough hole but also
increases drill breakage.
4. For small workpieces that cannot be clamped to the table, use a Drill Press
Vice. The vice must be clamped or bolted to the table.
5. When drilling completely through wood, always
position a piece of scrap wood between the
workpiece and the table to prevent
splintering on the underside of the workpiece
as the drill breaks through. The scrap piece of
wood must make contact with the left side of
the column as shown in Fig 14. In addition,
set the depth of drill travel so that the drill
cannot possibly come into contact with the
table, or align the table so that the hole in it’s
centre is directly in line with the drill bit.
6. Mark where you want to drill on the
workpiece by using a centre punch.
7. When completely satisfied that the setup is
sound, lower the Chuck Guard into place
and switch the machine ON by raising the
switch cover, as shown in FIG 8, and pushing the GREEN ‘I’ button.
8. Before turning on the drill, turn the feed handles to bring the drill bit down.
Line the drill bit tip up with the mark.
9. Turn on the drill and pull down on the feed handles with appropriate force
needed to allow the drill bit to drill into the material
Fig 14

18
10. To switch OFF, hit the switch cover, which will push the RED ‘O’ button,
turning the machine OFF.
Caution: FEEDING TOO RAPIDLY might stop the motor, cause the belt to
slip, force the workpiece loose, or break the drill bit. Practice with
scrap material to get the feel of the machine before attempting
any drilling operation.
NOTES:
a. As a safety feature, the ON/OFF switch is a No-Volt Release type.
Therefore, if the power is interrupted whilst the machine is switched ON, it
will not automatically start when the power is restored.
b. A microswitch is provided within the pulley cover, which prevents the
machine from operating unless the pulley cover is firmly closed.
c. A light is also provided which is built into the head. The lightswitch is
located on the front panel, directly below the ON/OFF switch.
TO ADJUST DRILLING DEPTH
SPINDLE DEPTH SCALE METHOD
1. With the power OFF, lower the drill bit so that it contacts the work and hold
in that position.
2. Slacken off the locking screw and turn the collar so that the measurement
for the depth of hole required is in line with the pointer. Lock the collar in
this position using the locking screw.
The drill is now set to drill holes to your pre-determined depth, from that
particular start point.
TO ADJUST DRILLING DEPTH
SPINDLE DEPTH SCALE METHOD
1. With the power OFF, lower the drill bit so that it contacts the work and hold
in that position.
2. Slacken off the locking screw and turn the collar so that the measurement
for the depth of hole required is in line with the pointer. Lock the collar in
this position using the locking screw.
The drill is now set to drill holes to your pre-determined depth, from that
particular start point.
WORKPIECE METHOD
1. Mark the desired depth of the drill hole on the side of the workpiece.
2. With the machine not running, bring the drill bit down until the tip is level
with the mark.
3. Holding the feed handles at this position and lock the collar in position
using the locking screw. The chuck and the drill bit will now be stopped at

19
the distance selected on the depth stop collar.
TO DRILL DIFFERENT MATERIALS
FEEDING THE DRILL BIT
• Pull down on the feed handles with only enough force to allow the
drill bit to cut.
• FEEDING TOO RAPIDLY could stall the motor, cause the belt to slip,
damage the workpiece, or break the drill bit.
• FEEDING TOO SLOWLY could cause the drill bit to heat up and burn
the workpiece.
DRILLING METAL
• Use metal-piercing twist drill bits.
• It is always necessary to lubricate the tip of the drill with oil to
prevent overheating the drill bit.
• All metal workpieces should be clamped down securely. Any tilting,
twisting, or shifting causes a rough drill hole, and increases the
potential of drill bit breakage.
• Never hold a metal workpiece with your bare hands. The cutting
edge of the drill bit may seize the workpiece and throw it, causing
injury. The drill bit will break if the metal piece hits the column.
• If the metal is flat, clamp a piece of wood under it to prevent
turning. If it cannot be laid flat on the table, then it should be
blocked and clamped.
DRILLING WOOD
• Brad point bits are preferred. Metal piercing twist bits may be used
on wood.
• Do not use auger bits which turn so rapidly that they can lift the
workpiece off the table and whirl it around.
• Always protect the drill bit by positioning the table so that the drill bit
will enter the centre hole when drilling through the workpiece.
• To prevent splintering, feed drill bit slowly when the bit is about to
cut through to the reverse side of the workpiece.
• To reduce splintering and protect the point of the bit, use scrap
wood as a backing or a base block under the workpiece.

20
Spindle Motor Drill Spindle Motor Drill
Pulley Pulley Speed Pulley Pulley Speed
A B RPM A B RPM
1 5 1 195 9 4 3 740
2 4 1 290 10 5 4 765
3 5 2 310 11 1 2 1320
4 3 1 420 12 2 3 1550
5 5 3 470 13 3 4 1660
6 4 2 490 14 1 3 2350
7 2 1 610 15 2 4 2410
8 3 2 680 16 1 4 3645
SPINDLE PULLEY MOTOR PULLEY
1
2
3
4
A
1
2
3
4
B
5
MACHINE SPEED TABLE
The table below gives the belt arrangements for given drill speeds. The
diagram shows the belts fitted to A1 and B3, giving a drill speed of 2350RPM.
A full chart is also located on the inside of the pulley cover.