USER MANUAL DRILL SERGEANT - Angle-Drilling System MODEL: ADS4590 - Shopify
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USER MANUAL
DRILL SERGEANT
Angle-Drilling System
Lumberjack Tools Inc. MODEL: ADS4590
PO Box 730
Chippewa Falls, WI 54729
www.lumberjacktools.com
Email: info@lumberjacktools.com
Phone: 715-720-4719
Rev: 1/18TABLE OF CONTENTS
General Information
About Your Product.…………………………………………………………. … 3
Warnings and Safety…………….……………………..…….….……………… 3
What’s Included…..………………….……………………..…….….…………. 4
Required Tools……………….……………………..…….….…………….…… 4
Troubleshooting….………………………….……………………..…….……… 17
Assembly
Swing Arm Attachment………………………………………………………. … 5
Slide Assembly..…………….…………………………………………………… 6
Slide Installation…………….…………………………………………………… 8
Brace Plate Installation………………………………………..….…………. … 9
Safety Pin Installation…………………………………………………………… 10
Drill Depth Stop Installation…………………………………………………. ….10
Test
Slide Clearance………………………………………………………………. … 7
Adjustability…....…………….…………………………………………………… 10
Set Up
Lock Slide………………………………………………………………………… 11
Align Log Lock…………………………………………………………………… 11
Install Self-Feed Bit.…………….………………………………………………. 11
Hook Up Drill……………….…………………………………………………. ….11
Mount To Work Station………………………………………..….…………. ….12
Operation
Setting Angles……………………………………………………………………. 13
Set Hole Depth……………………………………………………………………13
Drilling Holes…………..………………………………………..….……………..14
Maintenance
Cleaning, Inspection & Bearing Grease…..………………………………….. 15
Bushing Replacement……..………………………………………………… ….16
Adjust Drill Center……..……………………………………………………..…. 16
2About Your Product
Thank you for purchasing our Drill Sergeant!
The Drill Sergeant is designed to produce consistent angled mortise holes for any project. The fixture is laser cut from
structural steel and formed in a press brake in order to withstand the high torque of drilling angled mortise holes.
Simply screw down the fixture to a stable work surface, hook up a single-speed 1/2” drill and you’re ready to go.
Our lifetime guarantee covers the steel body parts, aluminum bearing block, and shank for manufacturing defects.
Normal wear and tear is NOT covered under warranty. The nuts, bolts, washers and screw handle are covered for 90
days from the date of purchase for breakage under normal working conditions. Excessive log overhang, or side
loading the fixture could cause failure to occur in the bolts. Over tightening of the screw handles may bend the
bolts or strip threading as a result. This is valid only to the original buyer, and not for the tools sold secondhand,
used, or sold “as is” to a second party.
What Voids Warranty
In order to keep our lifetime and 90 day warranty you must AVOID the
following actions:
● Side loading the fixture ● Using a forstner bit larger than 2”
● Over tightening the screw handles ● Failure to follow maintenance schedule
● Altering or misusing the fixture ● Unsupported log overhang of 24” or more
SAFETY
Before beginning any project, carefully read and follow ALL safety and operational instructions for any tools or devices you will
be using. Failure to do so may cause physical harm to yourself or those around you. If you feel uncomfortable using our Drill
Sergeant, STOP immediately. Lumberjack Tools assumes no responsibility for injury caused to the operator, bystander, or tools
used in conjunction with the use or misuse of our Drill Sergeant.
NEVER OPERATE POWER TOOLS UNDER THE INFLUENCE OF DRUGS, ALCOHOL, OR ANY MEDICATIONS
REPLACE THE WARNING LABELS IF THEY BECOME OBSCURED OR DAMAGED
KEEP SPACE AROUND THE FIXTURE CLEAN AND FREE OF DEBRIS
ALWAYS WEAR SAFETY GLASSES, DUST MASK, AND ANY OTHER PERSONAL PROTECTION ITEMS AS NEEDED
NEVER WEAR LOOSE ITEMS THAT COULD BE CAUGHT IN MOVING PARTS. SECURE LOOSE OR LONG HAIR AWAY
FROM AREA
WE STRONGLY RECOMMEND A SINGLE-SPEED, GEAR DRIVEN DRILL WITH RPMS OF 500 OR LESS. EXCEEDING
THESE RPMS MAY RESULT IN DAMAGE TO THE DRILL SERGEANT
ALWAYS LOCK SLIDE IN TOP POSITION WITH SAFETY PIN BEFORE MAKING ANY ADJUSTMENTS TO TOOLS, FIXTURE
OR WORK PIECE
NEVER USE FIXTURE WITHOUT BOLTING DOWN TO A LEVEL, SECURE SURFACE
NEVER PLACE ANY BODY PART UNDER SLIDE OR DRILL BIT. FAILURE TO DO SO MAY RESULT IN SERIOUS INJURY
ALWAYS DISCONNECT POWER AND ALLOW DRILL TO COME TO A COMPLETE STOP BEFORE INSTALLING,
REMOVING, OR ADJUSTING THE FIXTURE
NEVER APPLY BENDING FORCE (SIDE LOADING) TO THE FIXTURE. SIDE LOADING COULD CAUSE THE SHANK TO
FAIL, OR MAY RESULT IN FIXTURE DAMAGE
ALWAYS SECURE STOCK IN A VISE, CLAMP OR LOG LOCK PRIOR TO STARTING YOUR DRILL. FAILURE TO DO SO MAY
RESULT IN INJURY
3Note: Images not to scale What’s Included
1A 1B 1C 1D
Alignment Plate
Base Plate (Qty. 1) (Qty. 1) Slide Plate (Qty. 1) Swing Arm (Qty. 2)
1E 1F 1G 1H
Brace Plate (Qty. 1) Drill Chuck (Qty. 1) Pillow Block (Qty. 1) Drill Shank (Qty. 1)
Bag 1
2A 2B 2C 2D
Ø1/2” Shoulder Screw (Qty. 2) Ø3/8” Shoulder Screw (Qty. 4) Ø3/8” Large Washer (Qty. 4)
Handle (Qty. 2) 2F 2G 2H
2E
Ø3/8” x 3-1/2” Socket Cap Screw (Qty. 2) Ø3/8” x 2-1/2” Carriage Bolt (Qty. 2) Ø3/8” Lock Nut (Qty. 4)
Ø5/16” Lock Nut
(Qty. 4) 2J 2K
2I
Ø1/2” Gold Washer (Qty. 16) Ø3/8” Small Washer (Qty. 12)
Ø3/8” Spacer (Qty. 3) 2L 2M 2N
Retaining Ring (Qty. 2) Thrust Bushing (Qty. 2) Zerk (Qty. 1)
Bag 2
3A 3B 3C 3D 3E 3F
Ø3/8” x 1-3/4” Socket Ø1/4” x 1” Socket Cap #10 x 5/8” Socket Cap #10 Lock Nut
Cap Screw (Qty. 1) Screw (Qty. 4) Screw (Qty. 1) Ø1/4” Washer (Qty. 8) (Qty. 1)
3G 3H 3I 3J 3K
Ø3/8” Wing Ø1/4” Lock Nut Ø3/8” Lock Washer
Base Spacer (Qty. 2) Nut (Qty. 1) (Qty. 4) (Qty. 1) Safety Pin (Qty. 1) Lanyard (Qty. 1)
Required Tools
Allen Wrench Wrench/Socket Optional
● 3/16” ● 1/4” ● 3/8” ● 1/2” ● 5/16” ● Crescent Wrench
● 5/32” ● 5/16” ● 7/16” ● 9/16”
4Assembly
Tools Needed: Parts Needed:
1 Open Hardware Bag 1 and gather the items to
complete steps 1 through 4.
● 1/4” Allen Wrench
● 9/16” Wrench/Socket
●
1A
●
1D
Base Plate (Qty. 1)
Swing Arm (Qty. 2)
2G ●
2A Handle (Qty. 2)
Tape Pinch Point
stickers 1D ●
2B Ø1/2” Shoulder Screw (Qty. 2)
this side ●
2G Ø3/8” x 2-1/2” Carriage Bolt (Qty. 2)
●
2H Ø3/8” Lock Nut (Qty. 2)
2B
2G ●
2I Ø3/8” Spacer (Qty. 2)
2x 2J
●
2J Ø1/2” Gold Washer (Qty. 12)
●
2K Ø3/8” Small Washer (Qty. 6)
2x 2J 1A
1A
2B
Fig. 1 Fig. 2
a. Install the parts as shown in Fig. 1
● Use tape to hold the bolt heads in place
b. Align bolts with the two lower holes in Swing Arm as shown in Fig. 2
Note left vs. right
arm (sticker)
c. Install the parts in order as shown in Fig. 3
● Tighten handle 2A 2A until snug 2I 2A
● Tighten lock nut 2H2H (loosen ¼ turn if arm 2G 2J 2K 2K
too difficult to rotate)
d. Repeat steps 1-3 for the other Swing Arm
NOTE: Washers 2J
2J between swing arm and
base plate 2B 2J 2J 2K 2H
Fig. 3
IMPORTANT
It is critical to make sure that the Swing Arm is
fully engaged with the bolts. Failure to properly
install will make the fixture unstable.
● If the gap is greater than the washer
thickness the installation is WRONG
Gap No Gap
WRONG CORRECT
5Assembly
Tools Needed: Parts Needed:
2 2H
2K
● 5/16” Allen Wrench
● 5/16” Socket
●
1C
●
1F
Slide Plate (Qty. 1)
Drill Chuck (Qty. 1)
● 9/16” Wrench/Socket ●
1G Pillow Block (Qty. 1)
2N
●
1H Drill Shank (Qty. 1)
1G ●
2F Ø3/8” x 3-1/2” Socket Cap Screw (Qty. 2)
a. Complete the slide assembly with
the parts shown in Fig. 4 ●
2H Ø3/8” Lock Nut (Qty. 2)
● Note the direction the Zerk is fac- ●
2K Ø3/8” Small Washer (Qty. 4)
ing ●
2L Retaining Ring (Qty. 2)
1C
● Snug Zerk lightly with a 5/16” Sock-
●
2M Thrust Bushing (Qty. 2)
et
2K ●
2N Zerk (Qty. 1)
b. Center the Pillow Block in the Slide
Plate as shown in Fig. 5
2F
● This can be adjusted after installa-
tion is finished
Fig. 4
Adjustment Fig. 5
c. Screw the Chuck tight to the Shank and apply a thin layer of
grease to Shank body before installing into the pillow block as
shown. We recommend using a permanent thread locker on
the Chuck threads. DO NOT allow thread locker to contact the
Shank body!
● Secure in place using the Thrust bushings and retaining rings
● Refer to Fig. 6 & 7
IMPORTANT
DO NOT force Shank. Shank must
be installed perfectly straight into
pillow block! If Shank binds, re-
2M align and re-install.
2L
IMPORTANT
1H 2M Be extremely careful not to
damage shank surface during
2L installation!
1F
Fig. 6
Fig. 7
6Assembly
3 Test Slide Clearance
a. Set the Swing Arm position to 0o
● Make sure Shoulder Bolts and Handles are tight
b. Check the slide-to-arm clearance at BOTTOM (near base plate)
● If more clearance is needed add washers 2J
2j between arm and Check Clearance
base plate, refer to Fig. 9
● If less clearance is needed remove washers 2J
2j between arm and
base plate, refer to Fig. 10
Rule of Thumb Base Plate 2J
● 4 total washers must always
be kept on the bottom
shoulder bolt 2b2B 2B
● (i.e. if you remove washers
from one side of 2b2B , you must
add those to the other side) Fig. 8
● Fig. 8 displays what happens
to the clearance when Move Washers
washers are moved
Less Clearance More Clearance
Washer movement
Max Clearance Min Clearance
4x 2J 2J
2G 2G
2B 2B
3x 2J
Fig. 9 Fig. 10
4x 2J 2J
For maximum clearance place all four washers in- For minimum clearance leave one washer in-between
between the base plate and swing arm on both the the base plate and swing arm, (this protects the
shoulder bolt 2b
2B and carriage bolt 2g
2G . Angle Sticker) on both shoulder bolt 2b
2B and carriage
● Repeat for second swing arm bolt 2g
2G be sure to follow the Rule of Thumb (Fig. 8)
● Repeat for second swing arm
7Assembly
Tools Needed: Parts Needed:
4 **some parts hidden
for clarity**
● 3/16” Allen Wrench
● 1/2” Wrench/Socket
● Slide Assembly (Qty. 1)
●
2C Ø3/8” Shoulder Screw (Qty. 4)
●
2D Ø3/8” Large Washer (Qty. 4)
●
2E Ø5/16” Lock Nut (Qty. 4)
ER 2E ● Two sheets of office paper
SPAC
(not included)
2D
2C
ER
SPAC
~2”
ER
Handle
C
(not shown)
SPA
facing this Tip
way
Use a 1/2” Wrench with tape
to hold the Ø5/16” Lock Nuts
while installing.
Fig. 12
Tape Together
Fig. 11
a. Lay the Drill Sergeant Arms flat on a surface
o
b. Loosen both screw handles three turns and position the arms to 0 using the Peep Sight
c. Install the slide assembly near the top of the Swing Arms (around 2”) and insert a paper spacer (sheet of paper
folded once) on both sides of the slide between the slide and the arm as shown in Fig. 12
d. Make sure handle on slide assembly is facing up (see next page for orientation) and install the parts as shown in
Fig. 11
e. Install lock nut 2E
2E on screw 2C
2C (use the wrench with tape method to hold the nut during installation) and
tighten by turning screw 2C2C
8Assembly
Tools Needed: Parts Needed:
5 Open Hardware Bag 2 and gather the items to
complete steps 5 through 7.
● 3/16” Allen Wrench
● 7/16” Wrench/Socket
●
1E
●
3B
Brace Plate (Qty. 1)
Ø1/4” x 1” Socket Cap Screw (Qty. 4)
●
3D Ø1/4” Washer (Qty. 8)
3D 3I 3I● Ø1/4” Lock Nut (Qty. 4)
3B 3B 3D
3D 1E
3D
3I
1E
~3”
ER
SPAC
CER
Handle
SPA
ER
SPAC
Fig. 13
Fig. 14
o
a. Look through the Peep Sight to make sure the arms are positioned at 0.
Tighten handles
b. Make sure slide is set about 3” below the top of the arms (Fig. 13)
c. Center the Brace Plate between the Swing Arms and install as shown
in Fig. 14. Make sure Brace Plate 1E
1E is on the same side as the slide Slide
handle. Be sure to tighten these four bolts very securely
d. Once installed, stand the assembly upright. Remove the paper spacers
and move the slide up and down the entire length (Fig. 15), if too
loose/tight readjust before continuing (see step 3 & step 5)
CAUTION
Assembly is very unstable when Fig. 15
standing up. Use one hand to
stabilize slide arms when upright.
9Assembly
Tools Needed: Parts Needed:
6 3E
● 5/32” Allen Wrench
● 3/8” Wrench/Socket
●
3C
●
3E
#10 x 5/8” Socket Cap Screw (Qty. 1)
#10 Lock Nut (Qty. 1)
3C ●
3F Lanyard (Qty. 1)
●
3K Safety Pin (Qty. 1)
3K
3F
Fig. 16
a. Install the parts as shown in Fig. 16
b. Once installed, move the slide back to top of arms
and lock in place using the Safety Pin 3K
3K
(see next page)
Parts Needed:
7 ●
2I
2K
●
Ø3/8” Spacer (Qty. 1)
Ø3/8” Small Washer (Qty. 2)
3A
●
3A Ø3/8” x 1-3/4” Socket Cap Screw (Qty. 1)
3J ●
3H Wing Nut (Qty. 1)
●
3J Ø3/8” Lock Washer (Qty. 1)
2K
2I
2K
3H
a. Attach the drill depth stop as shown in
Fig. 17
● This can be attached to either arm,
choose side you feel most comfortable
with
Fig. 17
Test Adjustability
Once assembled test the
fixture. Check that the
Slide arms can be adjusted from
0o to 45.o Make sure that
the slide can be moved up Rotate
and down the full arm
length.
10Set Up
Lock Slide 1 2 3
Lock the slide at the top of the
arms. **Top bolt hidden for
clarity**
1. Pull the slide up to top
2. Roll slide back into rest
3. Insert safety pin into slide
Note: If pin-hole is not visible after
step 2, slide is installed incorrectly
(handle facing wrong way)
Align Log Lock Align the Log Lock (not included) with the
Drill Sergeant Base Plate.
(See pg. 12 first for orientation)
1. Begin by securing a straight, 1 ½”
diameter piece of round stock in the
Log Lock
2. Place the Log Lock over the Drill
Sergeant Base Plate
3. Reposition the Log Lock until the
clamped piece of round stock is
centered in the v-channel of the
Drill Sergeant Base Plate
Install Self-Feed Bit Hook Up Drill
● Make sure safety pin is installed correctly ● Make sure safety pin is installed correctly
● Install the bit into the chuck and secure tightly (we ● Place the drill on the shank and secure tightly
recommend self-feed bits)
● DO NOT use spade bits with this fixture
11Set Up
Front Mount (straight holes, angled holes on 1st end of log)
● We do not recommend mounting this to a work
The purpose of the Alignment Plate station with a height greater than 30”
is to allow drilling holes in both ends
of stock. The Alignment Plate can
also be repositioned to allow Log
Lock setup for left & right handed
users.
● Note that the Alignment Plate
may be flipped to change Log
Lock orientation
1 3
5 7
● Use all 8
bolt
holes to
secure 6 8
Fig. 18
2 4
1B
Rear Mount (angled holes on 2nd end of log) Parts Needed:
●
3G Base Spacer (Qty. 2)
When moving the Alignment Plate and Log Lock to the rear
of the Drill Sergeant use the two Base Spacers 3G and
mount log lock on 2ⁿ� set of slots on alignment plate as
shown in Fig. 19. The Drill Sergeant will not be able to
o
reach 45 if the spacers are not used IMPORTANT Short Long
● Use all 8 bolt holes to secure
● The Long edge of the
align plate is always
where the handle of
the Log Lock must
be located
1B
2nd slot
Fig. 19
2nd slot 3G
12Operation
o o
Setting Angles The Drill Sergeant can drill any angle between 0 and 45
1. Loosen both screw handles 1-2 turns 0o 22.5o
WARNING
Very heavy, be careful
45o
when adjusting
n
lo o
se
lo o
sen
2. Keep one hand on Peep Sight 3. Tighten both screw handles so the angle holds
the top of fixture
and adjust to desired
angle setting by
n
looking through the
ht e
t ig
ht e
t ig
Peep Sight
n
Set Hole Depth
If you want to set a specific hole depth, you will need to use the drill stop and a ruler/tape measure.
1. With the self-feed bit installed, move the slide 2. Set the Drill Stop X inches away from the bottom of
down until the face of the bit comes into contact the slide to set your hole depth at X inches, tighten
with the log wing nut to secure
X
13Operation
Drilling Holes
Shank must be greased BEFORE use (pg. 15)
NEVER use anything larger than a 2” forstner bit in this fixture
NEVER use a spade bit in this fixture
Always make sure the log is secure and the screw handles are tight before drilling. We strongly recommend using
self-feed bits with this fixture.
1. Start drill before contacting log and slowly move the
self-feed bit into the log
IMPORTANT
Tip Advance Drill very slowly with light
If wood is splintering (tear out), pressure until bit enters the log
use some scotch tape on the log
where the bit enters the wood completely! Failure to do so may
cause damage to the bit or fixture
DO NOT Push
this direction
sh
sh
Pu
2. Hold steady pressure and
Pu
lean onto the slide handle
to aid the drill
● DO NOT apply cross-
force to the drill or
fixture
WRONG CORRECT
t
k Ou
c
Ba
3. Once you have reached your desired hole depth, stop
running the drill, switch to reverse and slowly back
the drill out of the hole
14Maintenance
● Fixture
- Cleaning
○ Keep the swing arms, base plate & slide plate clear of sap, wood chips and other build-up
○ Always remove drill & bit before cleaning
○ Always lock the slide plate with the safety pin before cleaning
○ Clean the plates with a solvent (such as mineral spirits)
- Oiling
○ Once cleaned apply grease or oil to slide arm rail track, to improve slide action
USE CAUTION WHILE MANEUVERING AROUND DRILL SERGEANT. DRILL SLIDE WILL CRUSH EXTREMITIES IF
NOT SECURED IN PLACE WITH SAFETY PIN.
● Fasteners
- Inspection
○ Check for visible thread damage
○ Do any of the bolts appear bent or deformed?
○ Replace any damaged nut, bolt or washer to reduce risk of damage
- Oiling
○ Apply oil to the shoulder bolts on a monthly basis
● Mounting
- Inspection
○ Make sure the screws securing the fixture to the workbench are still holding properly
○ Remove any debris between the workbench and fixture
○ Is the workbench still level and stable?
○ Replace any broken screws
○ Tighten any loose screws
● Bearing Grease
- Application
Re-greasing required every 250 holes. We recommend
a high-quality synthetic grease with moly. Lumberjack
Tools cannot guarantee reliability/function if using
GREASE
different grease. Attach the grease gun fitting over the
zerk located on the back of the slide. Grease gun can Zerk
be found at most hardware stores.
- Wipe excess grease from ends of shank
TASK EACH USE MONTHLY
Clean Fixture Plates X X
Inspect Shoulder Bolts X X
Inspect Mounting Bolts X X
Oil Shoulder Bolts X X
15Maintenance
Bushing Replacement
1 Follow Step 2 (Page 6) in reverse to remove the Pillow Block from the Slide Plate
Press Out
Press out the old sleeve bushing
● Local auto shops can do
this if you do not have the
proper equipment
It is EXTREMELY IMPORTANT
2 Press In
Press in the new sleeve bushing
to line up hole in replacement
bushing and hole in pillow
Hole ● Local auto shops can do block (where zerk fitting is)
this if you do not have the
proper equipment
● Follow step 2 (pg. 6) to re-install pillow block and chuck
● CRITICAL: bearing must be greased (pg. 16) BEFORE use
Zerk
Bearing Specs
Sleeve Bushing: SAE 660 material, Thrust Bushing: SAE 841 material,
Ø1" I.D. x Ø1-1/4" O.D. x 2-1/2" Length Ø1" I.D. x Ø1-1/2" O.D. x 1/8" Thickness
McMaster Carr Part Number: 7965K41 McMaster Carr Part Number: 5906K523
Adjusting Drill Center
Loosen
If drill sergeant is not drilling on-center, adjust the
pillow block.
1. Loosen the nuts and bolts holding the pillow block
in place using a 9/16” Wrench and 5/16” Allen
Wrench.
● Shift the pillow block either direction as-needed
● The pillow block can be adjusted ±3/16” to
account for off-center drilling
Adjust
2. Tighten the nuts and bolts securely
Loosen
16Troubleshooting
Clamping (Log Lock)
PROBLEM CAUSE SOLUTION
• Clamp is not applying enough pressure • Tighten handle until log is secured
• Log/Timber spins inside
clamp • Adjust top in ladder to properly fit
• Top not oriented properly over log
• Re-orient the log if needed
• Log sticking out too far from clamp • Position log with no more than 24” of
overhang
• Wobbling or Vibrating log in
fixture • Fixture loose on base • Re-tighten screws securing base
• Workbench not stable • Move fixture to more stable workbench
• Adjust top so that the handle end is higher
• Top not oriented over log properly
• Top not staying locked into than the ladder end
ladder • Re-orient the log and adjust the top as
• Log orientation making it difficult to secure
needed
Drilling
PROBLEM CAUSE SOLUTION
• Not applying enough pressure to the slide • Position yourself so that you can lean onto
the slide with your bodyweight
• Drill not cutting hole • Using forstner bit larger than 2” • DO NOT use a forstner bit larger than 2”
• Dull forstner bit • Use a sharp forstner bit
• Bushing block not aligned with log • Loosen screws holding bushing block to
• Not cutting hole in center of
center drill chuck (pg. 16)
log
• Log not straight enough • Rotate log until as straight as possible
• Not holding angle while • Screw handles not tight enough • Secure screw handles very tight
cutting
• Slide arms too tight against side • Re-do steps 3 and 4 (pages 7 and 8) with
• Slide assembly not sliding paper folded two times
well • Ø3/8" Shoulder screws are secured too tight • Loosen each Ø3/8" shoulder screw ¼ turn
until desired resistance reached
• Drill does not fit onto shank • Drill does not have a large enough capacity • Use drill with a 1/2” capacity chuck (or
chuck larger)
• Drill stops while cutting • Drill does not have enough power • Switch your drill to low speed (gear 1)
• Use a high-power, low rpm 1/2” drill
• Cannot install safety pin • Slide assembly installed backwards • Unbolt side assembly, rotate 180°, and
install per step 2
• Drill Sergeant shank has too • Sleeve bushing worn-out • Replace sleeve bushing (page 16)
much play (wobbles)
• Very difficult to adjust angle • Bottom shoulder bolts too tight • Loosen bottom, 1/2” shoulder bolts ¼ turn
• Drill bit not installed in drill chuck straight • Re-align drill bit in chuck
• Drill bit wobbles when
• Drill bit bent • Replace drill bit
spinning
• Sleeve bushing worn-out • Replace sleeve bushing (page 16)
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