Hard
1-2 hours
This is an original replacement part sourced directly from the manufacturer. The lower guide wheel assembly is found in a band saw from Jet. This part is made of metal, and is connected to the lower guide bracket that helps control the position of the band saw blade. You may require an Allen wrench or hex key when replacing this item. The lower guide wheel assembly is sold as an individual replacement part.
Lower Guide Wheel Assembly JWBS18-339
OEM part for: Jet
Part Number: JWBS18-339
$40.89
Factory Backorder
Date Available: Unknown 
Compatibility
This Lower Guide Wheel Assembly will fit the following 1 machine. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Jet
This item works with the following types of products:
- Band Saw Parts
- Saw Parts
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Obsolete band saw part.
Could not find this old part anywhere. Even from the dealers! I should of tried you guys first and I will in the future. Thanks. SINBAD
Guest -
June 11, 2022
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Customer Repair Instructions ?
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Lower guide wheel assembly set screw was stripped. Guide bearings were seized. Back side trunnion was broken.
Thomas - February 1, 2020
Tool Type
Band Saw
Difficulty
Hard
Time
1-2 hours
Tools Used
Pliers, Socket set, Wrench Set, Adjustable Wrench, Metric Allen Wrenches, long and short
1. Unplugged bandsaw.
2. Removed throat plate, table pin and blade from machine. Set aside.
3. Unscrewed table clamp knobs completely. Set aside.
4. Lifted table from machine and put on solid flat surface upside down.
5. Unscrewed trunnions from bottom of table with socket and wrench. Saved bolts. discarded old trunnions.
6. Checked to see if new trunnions were exact fit. They were. Applied new scale decal to front side trunnion after cleaning off machining oils with acetone.
7. Checked fit of trunnion clamp shoes. Had to grind my old ones because they were mushroomed and wouldn't fit in new trunnions. After grinding and filing, they fit nicely and slid nicely with lubricating oil.
8. Loosely bolted new trunnions to table, remembering to keep trunnion clamp shoes and trunnion clamp bolts inside trunnions.
9. Removed lower guide guide bracket along with the lower guide wheel housings and the lower guide wheel assemblies from machine using allen wrench. Saved bolts. Placed on bench to work.
10. Removed bolts from lower guide wheel assemblies and lower guide bracket using metric allen wrench. Removed wing screws from lower guide wheel assemblies. Discarded old lower guide wheel assembles and old lower guide bracket. Saved bolts and wing screws.
11. Pushed new lower guide wheel assemblies into new lower guide wheel housings. Secured loosely with old wing screws. Lubricated shafts and wing screw threads with oil.
12. Pushed new blade support shaft w/ bearing into lower guide bracket. Secured loosely with new wing screw. Lubricated shaft and wing screw threads with oil.
13. With blade support shaft w/ bearing installed in lower guide bracket, and with both lower guide assemblies installed in lower guide wheel housings, bolt lower guide wheel housings to lower guide bracket using old bolts and allen wrench. Tighten securely.
14. Loosely bolted lower guide assembly back onto machine, sandwiching the old lower blade guard between the machine and the lower guide assembly.
15. Put oil on trunnion support bracket (still installed on machine) where new trunnions will ride.
16. Placed table back onto machine sliding trunnion clamp bolts into holes in trunnion support bracket and nesting new trunnions into trunnion support bracket.
17. Spun on both old table lock knobs and loosely secured table.
18. Centered trunnions (front to back) in trunnion support bracket, making sure table tilted freely and smoothly. Securely tighten lock knobs to capture trunnions.
19. Install blade back on machine. Adjusted to run centered on tires. Made sure all new bearings were out of the way of blade.
20. Adjusted lower guide bracket and blade support shaft with bearing and blade support shafts with bearings around blade. Secured all fasteners tightly.
21. Utilizing slop in trunnion bolt holes, adjusted table to be "parallel" with blade.
22. Tightened trunnion to table bolts, all six, securely. Loosened table lock knobs and tested table motion for smoothness. Retightened table lock knobs.
23. Plugged bandsaw back in and started it. Made sure blade was supported correctly with new parts.
24. Replaced pads on rip fence with new pads. Put rip fence on table. Made test rip cuts.
25. Satisfied and thrilled!
2. Removed throat plate, table pin and blade from machine. Set aside.
3. Unscrewed table clamp knobs completely. Set aside.
4. Lifted table from machine and put on solid flat surface upside down.
5. Unscrewed trunnions from bottom of table with socket and wrench. Saved bolts. discarded old trunnions.
6. Checked to see if new trunnions were exact fit. They were. Applied new scale decal to front side trunnion after cleaning off machining oils with acetone.
7. Checked fit of trunnion clamp shoes. Had to grind my old ones because they were mushroomed and wouldn't fit in new trunnions. After grinding and filing, they fit nicely and slid nicely with lubricating oil.
8. Loosely bolted new trunnions to table, remembering to keep trunnion clamp shoes and trunnion clamp bolts inside trunnions.
9. Removed lower guide guide bracket along with the lower guide wheel housings and the lower guide wheel assemblies from machine using allen wrench. Saved bolts. Placed on bench to work.
10. Removed bolts from lower guide wheel assemblies and lower guide bracket using metric allen wrench. Removed wing screws from lower guide wheel assemblies. Discarded old lower guide wheel assembles and old lower guide bracket. Saved bolts and wing screws.
11. Pushed new lower guide wheel assemblies into new lower guide wheel housings. Secured loosely with old wing screws. Lubricated shafts and wing screw threads with oil.
12. Pushed new blade support shaft w/ bearing into lower guide bracket. Secured loosely with new wing screw. Lubricated shaft and wing screw threads with oil.
13. With blade support shaft w/ bearing installed in lower guide bracket, and with both lower guide assemblies installed in lower guide wheel housings, bolt lower guide wheel housings to lower guide bracket using old bolts and allen wrench. Tighten securely.
14. Loosely bolted lower guide assembly back onto machine, sandwiching the old lower blade guard between the machine and the lower guide assembly.
15. Put oil on trunnion support bracket (still installed on machine) where new trunnions will ride.
16. Placed table back onto machine sliding trunnion clamp bolts into holes in trunnion support bracket and nesting new trunnions into trunnion support bracket.
17. Spun on both old table lock knobs and loosely secured table.
18. Centered trunnions (front to back) in trunnion support bracket, making sure table tilted freely and smoothly. Securely tighten lock knobs to capture trunnions.
19. Install blade back on machine. Adjusted to run centered on tires. Made sure all new bearings were out of the way of blade.
20. Adjusted lower guide bracket and blade support shaft with bearing and blade support shafts with bearings around blade. Secured all fasteners tightly.
21. Utilizing slop in trunnion bolt holes, adjusted table to be "parallel" with blade.
22. Tightened trunnion to table bolts, all six, securely. Loosened table lock knobs and tested table motion for smoothness. Retightened table lock knobs.
23. Plugged bandsaw back in and started it. Made sure blade was supported correctly with new parts.
24. Replaced pads on rip fence with new pads. Put rip fence on table. Made test rip cuts.
25. Satisfied and thrilled!
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Guide worn
joseph - November 4, 2019
Tool Type
Band Saw
Difficulty
Medium
Time
1-2 hours
Tools Used
Wrench Set, Adjustable Wrench
Parts Used
Replace guide bushing
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All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
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