INCRA Lead Screw User Manual

w w w. in c ra .c o m

Lead Screw Replacement Instructions (Carriage)

Tools required:
Small Crescent Wrench, Phillips Screwdriver, 1/8” hex key, 5/32” hex key, x-acto knife or scratch awl.

1. Remove fence from end of the LS Carriage the un­clamp and slide the
Carriage out of the
base.

2. Use a 5/32” hex key to unscrew the set screw
through the access hole in the
fence mounting bracket and
remove the spring and ball
bearing. You may need to tip
the carriage forward to allow
the ball bearing to roll out.
Retain the set screw, spring
and ball bearing for re-assem­bly.

3. Remove locking
nut and set screw
along with all (5)
Phillips head screws
from end plate
located at rear end
of carriage. Remove
end plate. Keep
carriage horizontal
when removing end plate to avoid losing the ball
bearing located inside of the black spacer at the rear
end of the lead screw.

4. Slide the 3/8” long
black spacer with
5/16” diameter ball
bearing located at
the end of the lead
screw out of the car­riage.

5. Use an x-acto knife or a
scratch awl to slide the (2)
long black plastic rods located
on either side of the lead
screw out of the carriage.

6. Pull on the Red
Micro Adjust Knob to
snap the Lead Screw
Assembly out of the
carriage. Again, keep
the carriage horizontal
when removing the
lead screw in order to
retain the 5/16” diam­eter ball bearing located inside of the black spacer
at the forward end of the lead screw. If necessary,
use a screwdriver between the between the carriage
and the red knob to GENTLY leverage the lead screw
assembly up and out of the carriage. Slide the large
black washer located next to the black micro adjust
disc off and add it to the new Lead Screw Assembly.

7. Before installing the
new Lead Screw As­sembly, make sure that
the 5/16” diameter ball
bearing is still inside the
1/4” long black spacer
located just behind
the fence mounting
bracket.

8. Carefully lower the
new Lead Screw As­sembly into the carriage
starting at the forward
(fence mounting brack­et) end and snap the
assembly into position.

9. Slide the (2) long
black plastic rods into
the extruded cavities
on either side of the
lead screw.

®

RETAIN BLACK
WASHER

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Manufactured by: Taylor Design Group, Inc. P.O. BOX 810262 Dallas, TX 753 81 w w w . i n c r a . c o m

w w w. in c ra .c o m

Lead Screw Replacement Instructions (Carriage)

10. Slide the 3/8” long
black spacer with the
5/16” diameter ball
bearing inside into the
carriage at the rear end
of the lead screw.

11. Re-attach the carriage end plate using the (5) Phil­lips head screws. TO AVOID STRIPPING THE THREADS,
DO NOT USE A POWER DRIVER DURING ASSEMBLY.

TO AVOID STRIPPING
THE THREADS, DO
NOT USE A POWER
DRIVER DURING
RE-ASSEMBLY.

13. Replace the ball
bearing, followed by
the spring and the
set screw through
the hole located in
the front of the fence
mounting bracket.
Thread the set screw in until it is just below the face of
the fence mounting bracket. DO NOT TIGHTEN THIS

SET SCREW.

14. If converting to the Metric Lead Screw Assembly,
remove all existing scales on the top of the carriage
and replace with (1)
430mm
Lexan scale and (1)
Stainless Steel scale.

12. Hand thread the set screw into the end plate.
This set screw is used to remove end to end play in
the Lead Screw Assembly. ROTATE THIS SET SCREW

WITH YOUR FINGERS ONLY until end to end play is

removed. You can test for end play by pushing and
pulling on the Red Micro Adjust Knob. Once the end
play is removed, use a 1/8” hex key to hold the set
screw in place as you thread on and tighten the lock­ing nut. DO NOT USE THE HEX KEY TO TIGHTEN THE

SET SCREW. EXCESSIVE PRESSURE ON THE END OF THE
LEAD SCREW WILL NOT PERMIT EASY ROTATION AND
MAY DAMAGE THE FENCE MOUNTING BRACKET! After

tightening the locking nut, check for end play and
fine-tune as necessary.

Photography: Grahame Waterson
Manufactured by:

Taylor Design Group, Inc.

P.O. BOX 8102 62 Dallas, TX 753 81
www.in c ra .co m

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INCRA is a Registered Trademark of Taylor Design Group

©2010 Taylor Design Group, Inc.

INCR A Tools are pro tect ed by one o r more o f the f ollowing U S pate nts:
#4, 793, 604, #4 ,93 0,2 21, #5 ,195,73 0, #5 ,275,074 , #5, 423 ,360, # 5,716, 04 5, #6 ,23 7,457,
#6,5 57,601, #6,67 2,190. Other p aten ts gr ante d or pen ding. rev.03 .10.2010

MADE IN THE

USA