Wen 4212 User manual

Model # 4212
10˝ VARIABLE SPEED
DRILL PRESS
bit.ly/wenvideo
Your new tool has been engineered and manufactured to WEN’s highest standards for dependability,
ease of operation, and operator safety. When properly cared for, this product will supply you years
of rugged, trouble-free performance. Pay close attention to the rules for safe operation, warnings,
and cautions. If you use your tool properly and for intended purpose, you will enjoy years of safe,
reliable service.
IMPORTANT:
NEED HELP? CONTACT US!
Have product questions? Need technical support?
Please feel free to contact us at:
800-232-1195
[email protected]
WENPRODUCTS.COM
(M-F 8AM-5PM CST)

TABLE OF CONTENTS
Technical Data 2
3
4
5
6
7
14
17
18
19
21
General Safety Rules
Specific Safety Rules For Drill Press
Electrical Information
Know Your Drill Press
Assembly and Adjustments
Operation
Maintenance
Exploded View and Parts List
Warranty
TECHNICAL DATA
Model Number:
Motor:
Speed:
Chuck Capacity:
Spindle Taper:
Stroke:
Spindle to Column:
Table tilt:
Laser:
Weight:
4212
120 V, 60 Hz, 4.5 A, 3/4 HP
530-3100 RPM (no load)
1/16 in. to 1/2 in.
JT33
2-1/2 in.
5-1/8 in.
0 to 45° left and right
Class II
63 lb
2
Troubleshooting

3
GENERAL SAFETY RULES
Safety is a combination of common sense, staying alert and knowing how your item works. SAVE THESE SAFE-
TY INSTRUCTIONS.
WARNING: To avoid mistakes and serious injury, do not plug in your tool until the following
steps have been read and understood.
1. READ and become familiar with this entire instruction manual. LEARN the tool’s applications, limitations, and
possible hazards.
2. AVOID DANGEROUS CONDITIONS. Do not use power tools in wet/damp areas or expose them to rain.
Keep work areas well lit.
3. DO NOT use power tools in the presence of flammable liquids or gases.
4. ALWAYS keep your work area clean, uncluttered, and well lit. DO NOT work on floor surfaces that are slippery
with sawdust or wax.
5. KEEP BYSTANDERS AT A SAFE DISTANCE from the work area, especially when the tool is operating.
NEVER allow children or pets near the tool.
6. DO NOT FORCE THE TOOL to do a job for which it was not designed.
7. DRESS FOR SAFETY. Do not wear loose clothing, gloves, neckties, or jewelry (rings, watches, etc.) when op-
erating the tool. Inappropriate clothing and items can get caught in moving parts and draw you in. ALWAYS wear
non-slip footwear and tie back long hair.
8. WEAR A FACE MASK OR DUST MASK to fight the dust produced by sawing operations.
WARNING: Dust generated from certain materials can be hazardous to your health. Always oper-
ate the tool in a well-ventilated area and provide for proper dust removal. Use dust collection sys-
tems whenever possible.
9. ALWAYS remove the power cord plug from the electrical outlet when making adjustments, changing parts,
cleaning, or working on the tool.
10. KEEP GUARDS IN PLACE AND IN WORKING ORDER.
11. AVOID ACCIDENTAL START-UPS. Make sure the power switch is in the OFF position before plugging in
the power cord.
12. REMOVE ADJUSTMENT TOOLS. Always make sure all adjustment tools are removed from the saw before
turning it on.
13. NEVER LEAVE A RUNNING TOOL UNATTENDED. Turn the power switch to OFF. Do not leave the
tool until it has come to a complete stop.
14. NEVER STAND ON A TOOL. Serious injury could result if the tool tips or is accidentally hit. DO NOT store
anything above or near the tool.

4
15. DO NOT OVERREACH. Keep proper footing and balance at all times. Wear oil-resistant rubber-soled foot-
wear. Keep the floor clear of oil, scrap, and other debris.
16. MAINTAIN TOOLS PROPERLY. ALWAYS keep tools clean and in good working order. Follow instruc-
tions for lubricating and changing accessories.
17. CHECK FOR DAMAGED PARTS. Check for alignment of moving parts, jamming, breakage, improper
mounting, or any other conditions that may affect the tool’s operation. Any part that is damaged should be properly
repaired or replaced before use.
18. MAKE THE WORKSHOP CHILDPROOF. Use padlocks and master switches and ALWAYS remove start-
er keys.
19. DO NOT operate the tool if you are under the influence of drugs, alcohol, or medication that may affect your
ability to properly use the tool.
20. USE SAFETY GOGGLES AT ALL TIMES that comply with ANSI Z87.1. Normal safety glasses only have
impact resistant lenses and are not designed for safety. Wear a face or dust mask when working in a dusty environ-
ment. Use ear protection such as plugs or muffs during extended periods of operation.
GENERAL SAFETY RULES
WARNING: Do not operate this tool until it is completely assembled and installed according to
the instructions.
1. Never turn the drill press on until the table is clear of all foreign objects (tools, scraps, etc.).
2. Always keep hands and fingers away from the drill bit.
3. Do not drill materials without a flat surface unless a suitable support is used (clamp or vice).
4. Never start the drill press with the drill bit pressed against the workpiece.
5. Make sure the table lock is tightened before starting the drill press.
6. Never layout, assemble, or set-up any work on the table while the drill is on.
7. Make sure the drill bit is securely locked in the chuck.
8. Make sure the chuck key is removed from the chuck before turning power on.
9. Adjust the table or depth stop to avoid drilling into the table.
SPECIFIC RULES FOR DRILL PRESS

5
SPECIFIC RULES FOR DRILL PRESS
10. Always stop the drill before removing scrap pieces from the table.
11. Use clamps or a vise to secure a workpiece to the table. This will prevent the workpiece from rotating with the
drill bit.
12. Do not wear gloves when operating a drill press.
13. Set the drill press to the speed that is appropriate for the material being drilled.
14. If any part of the drill press is missing/damaged or if the electrical components fail to perform properly, shut the
power OFF and unplug the drill press. Replace missing, damaged or failed parts before resuming operation.
15. Before leaving the machine, shut the power off, remove the drill bit and clean the table.
ELECTRICAL INFORMATION
GROUNDING INSTRUCTIONS
IN THE EVENT OF A MALFUNCTION OR BREAKDOWN, grounding provides the path of least resistance
for an electric current and reduces the risk of electric shock. This tool is equipped with an electric cord that has an
equipment grounding conductor and a grounding plug. The plug MUST be plugged into a matching outlet that is
properly installed and grounded in accordance with ALL local codes and ordinances.
DO NOT MODIFY THE PLUG PROVIDED. If it will not fit the outlet, have the proper outlet installed by a
licensed electrician.
IMPROPER CONNECTION of the equipment grounding conductor can result in electric shock. The conduc-
tor with the green insulation (with or without yellow stripes) is the equipment grounding conductor. If repair or
replacement of the electric cord or plug is necessary, DO NOT connect the equipment grounding conductor to a
live terminal.
CHECK with a licensed electrician or service personnel if you do not completely understand the grounding instruc-
tions or whether the tool is properly grounded.
USE ONLY THREE-WIRE EXTENSION CORDS that have three-pronged plugs and outlets that accept the
tool’s plug as shown in Fig. A. Repair or replace a damaged or worn cord immediately.
CAUTION: In all cases, make certain the outlet in question is properly ground-
ed. If you are not sure, have a licensed electrician check the outlet.
WARNING: This tool is for indoor use only. Do not expose to rain or use in
damp locations.
FIGURE A

GUIDELINES FOR USING EXTENSION CORDS
Make sure your extension cord is in good condition. When using an extension cord, be sure to use one heavy
enough to carry the current your product will draw. An undersized cord will cause a drop in line voltage resulting
in loss of power and overheating. The table below shows the correct size to be used according to cord length and
nameplate ampere rating. When in doubt, use a heavier cord. The smaller the gauge number, the heavier the cord.
Make sure your extension cord is properly wired and in good condition. Always replace a damaged extension cord
or have it repaired by a qualified person before using it.
Protect your extension cords from sharp objects, excessive heat and damp/wet areas.
Use a separate electrical circuit for your tools. This circuit must not be less than a #12 wire and should
be protected with a 15 A time-delayed fuse. Before connecting the motor to the power line, make sure
the switch is in the OFF position and the electric current is rated the same as the current stamped on
the motor nameplate. Running at a lower voltage will damage the motor.
WARNING: This tool must be grounded while in use to protect the operator from electric shock.
6
AMPERAGE REQUIRED GAUGE FOR EXTENSION CORDS
25 ft. 50 ft. 100 ft. 150 ft.
4.5 A 18 gauge 16 gauge 16 gauge 14 gauge
ELECTRICAL INFORMATION
KNOW YOUR DRILL PRESS
Speed Control Handle
Support Lock Handle
Table
Base
ON/OFF Switch
Safety Key
Digital Speed Readout
Chuck
Feed Handle
Column
Rack
Crank Handle
Laser ON/OFF Switch
Housing Cover Screw
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
12
2
3
4
5
6
7
89
10
11
13
14

7
AMPERAGE REQUIRED GAUGE FOR EXTENSION CORDS
25 ft. 50 ft. 100 ft. 150 ft.
4.5 A 18 gauge 16 gauge 16 gauge 14 gauge
ASSEMBLY AND ADJUSTMENTS
UNPACKING
Unpack the drill press and all of its parts. Compare against the list below. Do not discard the carton or any
packaging until the drill press is completely assembled.
To protect the drill press from moisture, a protective coating has been applied to the machine’s surfaces. Remove
this coating with a soft cloth moistened with kerosene or WD-40®. Do not use acetone, gasoline, or lacquer
thinner to clean. Apply a coat of good paste wax to the table and column. Wipe all parts with a clean dry cloth.
1
2
3
4
5
6
7
Head/Motor Assembly
Base
Table Locking Handle
Table Assembly
Table Adjustment Handle
AAA Batteries (2)
Chuck
8
9
10
11
12
13
Chuck Key
Speed Adjustment Handle
Feed Handles (3)
Hex Wrench
Hex Head Bolts (4)
Column Assembly
WARNING: If any part is missing or damaged, do not plug the drill press in until the missing or damaged
part is repaired or replaced.
The column assembly (column, column support, rack, rack collar, and table support bracket) must be attached to
the base. The table and table support handles must be attached to the table support bracket. The motor housing
must be attached to the column.
Tools needed for assembly
• Adjustable wrench
• screwdriver
• Hammer and block of wood

88
ASSEMBLY AND ADJUSTMENTS
COLUMN ASSEMBLY TO BASE
1. Place the column tube (Fig. A - 2) on the base (Fig. A - 1), aligning the column
support holes to the base holes.
2. Install a hex head bolt (Fig. A - 3) in each column support hole and tighten
bolts using the adjustable wrench.
TABLE TO COLUMN
1. Loosen set screw (Fig. B - 2) in rack collar (Fig. B - 1) and remove the collar
and the rack (Fig. B - 3) from the column.
2. Insert the rack (Fig. B - 3) into the geared groove of the table assembly. Make
sure the worm shaft (Fig. B - 5) on the inside of the table support is engaged with
the teeth of the rack. The table support should sit at the center of the rack.
3. Slide the table support and rack assembly down together onto the column.
Insert the bottom edge of the rack into the lip (Fig. B - 6) of the column support.
Hold in this position until step 4 is completed.
4. Place the collar (Fig. B - 1) bevel side down over the rack. Tighten the set
screw (2) with the 3 mm allen wrench to hold the rack in position (Fig. B - 3).
Note: Make sure there is enough clearance to allow the table and rack to rotate
around the column. The collar must sit loosely over the top of the rack and not
angled on the column. To avoid column or collar damage, only tighten the set
screw enough to keep collar in place (Fig. 3).
5. Insert the table support crank handle (Fig. C - 1) into the worm gear shaft
on the side of the table support (Fig. B - 5). Make sure the set screw (Fig. C - 2)
is aligned on the flat of the shaft and as close to the table support as possible.
Tighten the set screw (Fig. C).
6. Position the table in the same direction as the base, and tighten the support
lock handle.
1
2
3
12
3
4
5
Fig. A
Fig. B
6
Fig. C
2
1

9
ASSEMBLY AND ADJUSTMENTS
DRILL PRESS HEAD TO COLUMN
CAUTION: The drill press head is heavy. To avoid injury, two people
should lift it into position.
1. Carefully lift the drill press head assembly and position it over the column
(Fig. D).
2. Place the mounting opening on the drill press head over the top of the col-
umn. Make sure the drill press head is seated properly on the column.
3. Align the direction of the drill press head with the direction of the base and
the table.
4. Tighten the set screws (Fig. E - 1) using a hex key.
SPEED AND FEED HANDLES
1. Insert the three feed handles (Fig. F - 2) into the threaded openings on the
feed hub (Fig. F - 1). Manually tighten the handles into the openings.
Note: When using the drill press, one or two of the feed handles may be
removed if an unusually-shaped workpiece interferes with handle rotation.
2. Insert the speed adjustment handle into the threaded opening on the speed
hub (Fig. G - 1). Manually tighten handle into opening.
INSTALL THE BATTERIES
1. Make sure the laser is turned off. Press the tab (Fig. H - 1) below the laser
power switch (Fig. H - 2) and lift up the laser switch cover (Fig. I - 1).
2. Insert the two AAA batteries in the battery compartment and close the
cover. NOTE: Remove the laser light batteries when the tool is to be stored
without use for more than a few days. If left in position, the batteries run the
risk of leaking, thereby damaging the laser guide assembly. Damage due to
leaking batteries is not covered by the warranty.
1
Fig. D
Fig. E
Fig. F
12
Fig. G
12
Fig. H
Fig. I 1
2
1

10
ASSEMBLY AND ADJUSTMENTS
MOUNT THE DRILL PRESS
The drill press must be securely fastened through the mounting holes (Fig. J
- 1, Fig. K) to a stand or workbench with heavy-duty fasteners. This will pre-
vent the drill press from tipping over, sliding, or walking during operation.
IMPORTANT: If the stand or workbench has a tendency to move during
operation, fasten the workbench securely to the floor.
INSTALL THE CHUCK
1. Inspect and clean the taper hole in the chuck and the chuck arbor.
Remove all grease, coatings, and particles from the chuck and chuck arbor
surfaces with a clean cloth.
2. Open the chuck jaws by manually turning the chuck barrel clockwise.
Make sure the jaws are completely recessed inside the chuck.
3. Seat the chuck on the chuck arbor by placing a block of wood (not includ-
ed) under the chuck and tapping it with a hammer (not included). Alterna-
tively, tap the chuck with a rubber mallet (not included) (Fig. L, Fig. M).
CAUTION: To avoid damaging the chuck, make sure the jaws are com-
pletely recessed into the chuck. Do not use a metal hammer to drive the
chuck into the spindle.
REMOVE THE CHUCK
1. Turn the feed handles to lower the chuck to the lowest position.
2. Place a ball joint separator above the chuck and tap it lightly with a ham-
mer to cause the chuck to drop from the spindle.
Note: To avoid possible damage to the drill or chuck, be prepared to catch
the chuck as it falls.
Fig. J
1
Fig. K
Fig. L
Fig. M

11
ASSEMBLY AND ADJUSTMENTS
RAISE OR LOWER THE TABLE
1. Loosen the support lock handle (Fig. N - 2) and turn the crank handle (Fig.
N - 1) until the table is at the desired height.
2. Tighten the support lock handle (Fig. N - 2) before drilling.
ROTATE THE TABLE
1. Loosen the support lock handle (Fig. N - 2) and turn the table around the
column to the desired position.
Note: The rack should rotate around the column with the table support bracket.
If the rack binds and does not rotate, slightly loosen the set screw in the rack
collar.
2. Tighten the support lock before drilling.
TILT THE TABLE
1. Loosen the bevel lock bolt (under table) (Fig. O - 2) with a suitable socket
wrench.
2. Tilt the table to the desired angle, using the bevel scale (Fig. O - 1) as a basic
guide.
3. Re-tighten the bevel lock bolt (Fig. O - 2).
4. To return the table to its original horizontal position, loosen the bevel lock
bolt (Fig. O - 2). Realign the table to the 0° setting on the bevel scale and tighten
the bevel lock bolt with the wrench.
FEED DEPTH ADJUSTMENT
Turn the depth scale ring to the desired depth. Lock the scale ring in place us-
ing the depth adjustment knob (Fig. P - 1). The drill bit will stop after traveling
the distance selected on the depth scale.
Fig. J
12
1
2
Fig. N
Fig. O
1
Fig. P

ASSEMBLY AND ADJUSTMENTS
12
WARNING: To avoid injury, make sure the chuck key is removed from
the chuck before starting any drilling operation.
INSTALLING A DRILL BIT
1. Place the chuck key into the side keyhole of the chuck, meshing the key
with the gear teeth.
2. Turn the chuck key counterclockwise to open the chuck jaws.
3. Insert a drill bit into the chuck far enough to obtain the maximum grip of
the chuck jaws.
4. Center the drill bit in the chuck jaws before the final tightening of the
chuck.
5. Tighten the chuck jaws using the chuck key to ensure that the drill bit will
not slip while drilling.
6. Remove the chuck key.
SQUARING THE TABLE TO THE DRILL BIT
Fig. Q
Fig. R
2
1
1. Insert a 3-inch-long drill bit (Fig. Q - 1) into the chuck (Fig. Q - 2) and tighten.
2. Raise and lock the table (Fig. Q - 3) about 1” from the end of the drill bit.
3. Place a combination square (Fig. Q - 4) on the table as shown. The drill bit should be parallel to the straight
edge of the square.
4. If an adjustment is needed, loosen the bevel lock (Fig. Q - 5) with a wrench. Square the table to the bit by tilting
the table. Tighten the bevel lock bolt (Fig. Q - 5) when square.
VARIABLE SPEED ADJUSTMENT
This is a mechanical variable speed drill press. To increase or decrease the speed, raise or lower the speed adjust-
ing handle (Fig. R - 1) while the drill press is running. When drilling, check the speed on the digital speed display
on the front of the drill press (Fig. R - 2).
NOTE: Do not attempt to change the drill press speed while the drill press is off. This can damage the drill press
and void the warranty.

13
ASSEMBLY AND ADJUSTMENTS
ADJUSTING THE LASER
WARNING: Do not stare directly at the laser beam. Please observe all
safety rules.
• Never aim the beam at a person or an object other than the workpiece.
• Do not project the laser beam into the eyes of others.
• Always make sure the laser beam is aimed at a workpiece that does not
possess reflective surfaces, as the laser beam could project into your eyes
or the eyes of others.
1. Place a workpiece on the table.
2. Turn the laser switch to the ON position.
3. Lower the drill bit to meet the workpiece. The two laser lines should
cross where the drill meets the workpiece (Fig. T).
4. If the laser needs to be adjusted:
a. Loosen the hex screw (Fig. S - 1) on each side of the head and ro-
tate the laser light house (Fig. S - 2) until the lines meet in the center of
the drilled hole on the workpiece.
b. Once finished, retighten the hex screws to secure the laser.
SPINDLE RETURN SPRING (Fig. 15a)
The spindle is equipped with an auto-return mechanism located on the
lefthand side of the drill press next to the speed control handle. The main
components are a spring and a notched housing. The spring was properly
adjusted at the factory and should not be readjusted unless absolutely nec-
essary. Sometimes, however, incorrect tension causes the quill to return
too rapidly or too slowly, in which case adjustments are necessary.
NOTE: wear work gloves to prevent injury during adjustment.
Fig. Q
Fig. S
Fig. T
1
2
Fig. U
1
2
3
4
1. Loosen the two nuts (Fig. U - 1 & 2) make sure that the spring housing (Fig. U - 3) remains engaged with the
head casting.
2. With a firm grasp on the spring housing (Fig. U - 3), pull out the housing and rotate it to adjust the spring ten-
sion (counterclockwise to increase tension or clockwise to decrease tension). Adjust the tension until the next slot
on the spring housing engages the raised notch (Fig. U - 4).
3. Once the spring tension has been properly adjusted, reattach inner nut (Fig. U - 1) until it contacts the spring
housing (Fig. U - 3). Then, back the nut out about 1/4 of a turn away from the spring housing.
4. Finally, tighten the outer nut (Fig. U - 1) against the nut B to hold the housing in place.

14
ASSEMBLY AND ADJUSTMENTS
ANGULAR “PLAY” OF THE SPINDLE
Move the spindle to the lowest downward position and hold in place.
Try to make the spindle revolve around its axis while also moving it
with a side motion. If there is too much “play”, proceed as follows:
1. Loosen the lock nut (Fig. V - 1).
2. Without obstructing the upward and downward motion of the
spindle, turn the screw (Fig. V - 2) clockwise to eliminate the “play.”
Note: A little bit of “play” is normal.
3. Tighten the lock nut (Fig. V - 1).
5
1
REPLACING THE BELT
WARNING: Disconnect the drill press from the power source before replacing the belt.
Belt tension and drill press speed is controlled by automatic adjustments made to the diameter of the front spindle
when the drive handle is moved.
Note: See page 19 for information on the variable speed function of this drill press.
1. Remove the screw that secures the housing cover. Open the housing cover.
2. Remove the belt from the housing cover if it is broken. If it is not broken, but is too stretched to operate
correctly, work the belt off the drive (motor) spindle. Then remove the belt from the front spindle.
3. Replace the belt by putting a new belt over the front spindle and carefully sliding the belt over the drive (motor)
spindle.
WARNING: Do not change the drive speed when the drill press is turned off.
DRILL PRESS ON/OFF SWITCH (Fig. 16)
1. To turn the drill press ON, insert the yellow safety key (Fig. W -
1) into the switch housing (Fig. W - 2). As a safety feature, the switch
cannot be turned ON without the safety key.
2. Turn the switch to the ON position.
3. To turn the drill press OFF, flip the switch downward.
4. To lock the switch in the OFF position, remove the safety key
(Fig. W - 1) from the switch. Store the safety key in a safe place.
2
2
Fig. V
1
Fig. W
OPERATION

15
OPERATION
INSTALLING A DRILL BIT
1. With the switch OFF, open the chuck jaws (Fig. X - 1) using the chuck key
(Fig. X - 2). Turn the chuck key counterclockwise to open the jaws.
2. Insert the drill bit (Fig. X - 3) into the chuck far enough to obtain the maxi-
mum gripping by the jaws, but not far enough to touch the spiral grooves of
the drill bit when the jaws are tightened.
3. Make sure the drill is centered in the chuck. Turn the chuck key (Fig. X -
2) clockwise to tighten the jaws.
POSITION THE TABLE AND WORKPIECE
Always place a piece of backup material (wood, plywood, etc.) on the table
underneath the workpiece . This will prevent splintering on the underside
of the workpiece as the drill bit breaks through. To keep the material from
spinning out of control, it must contact the left side of the column, or be
clamped (not included) to the table.
To prevent the workpiece or back-up material from spinning or rotating, you
MUST position it against the left side of the column (Fig. Y). Fig. Y
Fig. X
Note: For small workpieces that cannot be clamped to the table, use a drill press vise (not included). The vise
must be clamped or bolted to the table to avoid injury.
GENERAL DRILLING GUIDELINES - DRILLING A HOLE
WARNING: To prevent the workpiece and the backup material from slipping from your hand while drilling, po-
sition the workpiece and backup material to the left side of the column. If the workpiece and the backup material
are not long enough to reach the column, clamp the workpiece and backup material to the table. Failure to do this
could result in personal injury.
1. Mark where you want to drill the workpiece by using a center punch or a sharp nail. Turn ON the laser to mark
your drilling point also.
2. Before turning the drill press ON, turn the feed handles to bring the drill bit down. Line the drill bit tip up with
the mark. Clamp the workpiece in place.
3. Turn ON the drill press and pull down on the feed handles with the appropriate force needed to allow the drill
bit to drill the material.
4. It is good practice to touch the bit to the surface before fully committing to the cut to mark the surface of your
work piece. This helps ensure a straighter cut/hole while maximizing accuracy.
5. Make sure to routinely retract the bit to remove shavings and wood chips from the hole in order to prevent the
drill bit from binding.
Note: Feeding too slowly might cause the drill bit to turn in the chuck. 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 to do any drilling operation.

16
OPERATION
Drilling an unmeasured blind hole (not all the way through the workpiece) to a given depth can be done using
either the depth scale method or the workpiece method.
DRILLING SPEEDS
There are a few important factors to keep in mind when determining the best drilling speed:
• Material type
• Hole size
• Drill bit or cutter type
• Quality desired
Smaller drill bits require greater speed than larger drill bits. Softer materials require greater speed than harder
materials. See page 19 for recommended speeds for particular materials.
DRILLING METAL
• Use metal-piercing twist drill bits.
• It is always necessary to lubricate the tip of the drill with oil to prevent overheating of 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 serious injury. The drill bit will break if the metal piece suddenly 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. Auger bits turn so rapidly that they can lift the workpiece off of the table and whirl it
around.
• Always protect the drill bit by positioning the table so that the drill bit will enter the center hole when drilling
through the workpiece.
• To prevent splintering, feed the drill bit slowly right as the bit is about to cut through to the backside 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.
USING A VISE
For small workpieces that cannot be clamped to the table, use a drill press
vise. The vise must be clamped or bolted to the table (Fig. Z). Compatible
WEN Drill Press Vises include our WEN 424DPV 4-Inch Drill Press
Vise and our WEN 423DPV 3-Inch Drill Press Vise.
Fig. Z

17
OPERATION
MECHANICAL VARIABLE SPEED
This is a mechanical variable speed drill press. To increase or decrease
the speed when operating, raise or lower the speed handle (Fig. AA - 1).
Use the following table to determine the recommended speed for the
drill size you are using and the type of material you are to drill. While
drilling, check the speed on the digital speed readout (Fig. AA - 2)
located at the front of the drill press.
WARNING: Do not change speeds using the variable speed handle
without turning on the machine.
Recommended speed for drill bit size and materials
WARNING: For your safety, turn the switch off and remove the plug from the power supply before maintaining
or lubricating the drill press.
Vacuum sawdust or metal shavings that accumulate in and on the motor, pulley housing, table, and work surface.
Apply a light coat of paste wax to the column and table to help keep these surfaces clean and rust-free.
The ball bearings in the spindle and the V-belt pulley assembly are greased and permanently sealed. Pull the
spindle down and oil the spindle sleeve moderately every three months.
Lubricate the table bracket and locking knobs if they become difficult to use.
CAUTION: All servicing of the drill press should be performed by a qualified service technician.
MAINTENANCE
Fig. AA
FEEDING THE DRILL BIT
• Pull down on the feed handles with only enough force to allow the drill bit to cut.
• Feeding too rapidly might stall the motor, cause the belt to slip, damage the workpiece, or break the drill bit.
• Feeding too slowly will cause the drill bit to heat up and burn the workpiece.
1
2
SOFTWOOD HARDWOOD ACRYLIC BRASS ALUMINUM STEEL
3 to 5 mm 3000 RPM 3000 RPM 2500 RPM 3000 RPM 3000 RPM 3000 RPM
6 to 10 mm 3000 RPM 1500 RPM 2000 RPM 1200 RPM 2500 RPM 1000 RPM
11 to 16 mm 1500 RPM 750 RPM 1500 RPM 750 RPM 1500 RPM 600 RPM
17 to 25 mm 750 RPM 500 RPM Not Recommended 400 RPM 1000 RPM 250 RPM
TWIST DRILL
BIT SIZES
MATERIAL

18
TROUBLESHOOTING
PROBLEM CAUSES SOLUTIONS
Noisy operation 1) Incorrect belt tension
2) Dry spindle
3) Loose spindle pulley
4) Loose motor pulley
1) Adjust the belt tension
2) Lubricate the spindle
3) Tighten the retaining nut on the pulley insert
4) Tighten the set screw on the side of the mo-
tor pulley
The drill bit burns or
smokes
1) Drilling at the incorrect speed
2) The wood chips are not coming out
of the hole
3) Dull drill bit
4) Feeding the workpiece too slowly
5) Not lubricated
1) Change the speed
2) Retract the drill bit frequently to clear the
chips
3) Resharpen or replace the drill bit
4) Feed fast enough to cut the workpiece
5) Lubricate the drill bit with cutting oil or
motor oil
Excessive drill run
out or wobble;
drilled hole is not
round
1) Bent drill bit
2) Bit improperly installed in the
chuck
3) Worn spindle bearings
4) Lengths of cutting flutes or angles
not appropriate for the hardness of the
wood grain
5) Chuck not properly installed
1) Replace the drill bit
2) Reinstall the bit.
3) Replace the bearing. Take the press to a
qualified service technician
4) Resharpen the drill bit correctly or replace
with the appropriate type.
5) Reinstall the chuck.
Drill bit binds in the
workpiece
1) The workpiece is pinching the bit
2) Excessive feed pressure
1) Support or clamp the workpiece.
2) Feed more slowly.
Spindle returns too
slowly or too quickly
Coil spring has improper tension Adjust the coil spring tension
Chuck falls off
spindle
Dirt, grease, or oil on the tapered sur-
face on the spindle or in the chuck
Clean the tapered surface of both the chuck and
spindle with a household detergent.
Motor will not run 1) Defective or broken switch
2) Defective or damaged power cord
3) Open circuit, loose connections, or
burned out motor
4) Low voltage
1) Take to a qualified service technician
2) Take to a qualified service technician
3) Take to a qualified service technician
4) Check the power line for the proper
voltage. Use another circuit or have a qualified
electrician upgrade the service.
Motor stalls 1) Short circuit in motor
2) Incorrect fuses or circuit breakers
3) Overloaded circuit
4) Low Voltage
1) Take to a qualified service technician
2) Replace with correct fuse or circuit breaker
for the circuit
3) Turn off other machines and retry
4) Check the power line for the proper voltage.
Use another circuit or have a qualified electri-
cian upgrade the service.

19
EXPLODED VIEW & PARTS LIST
132

20
EXPLODED VIEW & PARTS LIST
# Part Number Description Qty
1 4212C-001 V belt 1
2 4212C-002 Set screw 2
3 4212C-003 Retaining ring 1
4 4212C-004 Upper motor pulley 1
5 4212C-005 Lower motor pulley 1
6 4212C-006 Spring 1
7 4212C-007 Set screw 1
8 4212C-008 Key 1
9 4212C-009 Spring seat 1
10 4212C-010 Shaft rack 1
11 4212C-011 Link plate 1
12 4212C-012 Set screw 2
13 4212C-013 Retaining ring 1
14 4212C-014 Ball bearing 1
15 4212C-015 Retaining ring 1
16 4212C-016 Upper spindle pulley 1
17 4212C-017 Lower spindle pulley 1
18 4212C-018 Set screw 2
19 Sleeve 1
20 Key 1
21 Ball bearing 1
22 Sensor disc 1
23 Magnet 1
24 Ball bearing 1
25 Retaining ring 1
26 Retaining ring 1
27 4212C-027 Knob 1
28 4212C-028 Nut 1
29 4212C-029 Flat washer 1
30 4212C-030 Belt house 1
31 4212C-031 Power cord 1
32 4212C-032 Hex head bolt 3
33 4212C-033 Lock washer 3
34 4212C-034 Flat washer 3
35 4212C-035 Motor 1
36 4212C-036 Motor support 1
37 4212C-037 Socket head screw 4
38 4212C-038 Flat washer 4
39 4212C-039 Pan head screw 6
40 4212C-040 Flat washer 6
41 4212C-041 Rubber washer 6
42 4212C-042 Bushing 2
43 4212C-043 Pan head screw 3
44 4212C-044 Flat washer 3
4212C-019
# Part Number Description Qty
45 4212C-045 Cord clamp 3
46 4212C-046 Hex nut 3
47 4212C-047 Lock nut 1
48 4212C-048 Spring washer 1
49 4212C-049 Hub 1
50 4212C-050 Speed adjusting handle 1
51 4212C-051 Handle cap 1
52 4212C-052 Flat head screw 3
53 4212C-053 Fixing plate 1
54 4212C-054 Key 1
55 4212C-055 Pinion shaft 1
56 4212C-056 Lock nut 1
57 4212C-057 Hex nut 1
58 4212C-058 Spring cover 1
59 4212C-059 Spring 1
60 4212C-060 Hex nut 1
61 4212C-061 Set screw 1
62 4212C-062
Sensor 1
63 4212C-063 Pan head screw 3
64 4212C-064 Flat washer 3
65 4212C-065 Set screw 1
66 4212C-066
Spring pin
1
67 4212C-067 Set screw 2
68 4212C-068 Head 1
69 4212C-069 AAA battery 2
70 4212C-070 Connecting terminal 2
71 4212C-071 Laser battery house 1
72 4212C-072 Pan head screw 2
73 4212C-073 Handle cap 3
74 4212C-074 Feed handle 3
75 4212C-075 Hub & pinion shaft 1
76 4212C-076 Depth scale 1
77 4212C-077 Rivet 2
78 4212C-078 Scale case 1
79 4212C-079 Wing screw 1
80 4212C-080 Flat washer 1
81 4212C-081 Pan head screw 1
82 4212C-082 Chuck key seat 1
83 4212C-083 Set screw 2
84 4212C-084 Pin 1
85 4212C-085 Rivet 1
86 4212C-086 Pointer 1
87 4212C-087 Serrated washer 2
88 4212C-088 Flat washer 2
# Part Number Description Qty
89 4212C-089 Lock washer 2
90 4212C-090 Pan head screw 2
91 4212C-091 Transformer 1
92 4212C-092 Pan head screw
2
93 4212C-093 Thread forming screw 4
94 4212C-094 Digital speed display 1
95 4212C-095 Switch box 1
96 4212C-096 Label 1
97 4212C-097 Switch mounting plate 1
98 4212C-098 Switch 1
99 4212C-099 Thread forming screw 3
100 4212C-100 Pan head screw 4
101 Rubber washer 1
102 Retaining ring 1
103 Ball bearing 1
104 Quill 1
105 Ball bearing 1
106 Spindle 1
107 4212C-107 Chuck with key 1
108 4212C-108 Laser 2
109 4212C-109 Spring 1
110 4212C-110 Flat washer 1
111 4212C-111 Pan head screw 1
112 4212C-112 Column collar 1
113 4212C-113 Set screw 1
114 4212C-114 Worm shaft 1
115 4212C-115 Lock handle 1
116 4212C-116 Rivet 2
117 4212C-117 Angle scale 1
118 4212C-118 Table support 1
119 4212C-119 Worm 1
120 4212C-120 Pin 1
121 4212C-121 Socket head screw 1
122 4212C-122 Table adjusting handle 1
123 4212C-123 Retaining ring 1
124 4212C-124 Rack 1
125 4212C-125 Column 1
126 4212C-126 Table 1
127 4212C-127 Hex head bolt 1
128 4212C-128 Lock washer 1
129 4212C-129 Column support 1
130 4212C-130 Hex head bolt 4
131 4212C-131 Base 1
132 4212C-132 Capacitor Cover 1
4212C-106