Troubleshooting Hvbs-Dm Series Band Saws - Jet HVS-8-DMW Operating Instructions And Parts Manual

10.0 Troubleshooting HVBS-DM series Band Saws

Symptom
Excessive blade
breakage
Premature blade dulling
Bad cuts (out-of-square)
Bad cuts (rough)
Blade is twisting
Unusual wear on side or
back of blade
Possible Cause
Material loose in vise.
Incorrect speed or feed.
Teeth too coarse for material.
Incorrect blade tension.
Saw blade in contact with workpiece
before saw is started.
Blade rubs on wheel shoulder.
Misaligned guides.
Cracking at weld.
Blade teeth too coarse.
Blade speed too high.
Inadequate feed pressure.
Hard spots in workpiece or scale on/in
workpiece.
Work hardening of material (especially
stainless steel).
Insufficient blade tension.
Operating saw without pressure on
workpiece.
Workpiece not square with blade.
Feed pressure too fast.
Guide bearings not adjusted properly.
Inadequate blade tension.
Span between the two blade guides
too wide.
Dull blade.
Incorrect blade speed.
Blade guide assembly is loose.
Blade guide bearing assembly loose.
Blade track too far away from wheel
shoulders.
Guide bearing worn.
Blade speed too high for feed
pressure.
Blade too coarse.
Blade is binding in the cut.
Blade tension too high.
Blade guides worn
Blade guide bearings not adjusted.
Blade guide bearing bracket is loose.
Correction*
Clamp work securely.
Check machinery handbook for speed/ feed
appropriate for material being cut.
Check machinery handbook for
recommended blade type.
Adjust blade tension to the point where the
blade just does not slip on the wheel.
Start motor before placing blade on
workpiece.
Adjust blade tracking.
Adjust guides.
Longer annealing cycle.
Use a finer tooth blade.
Try a lower blade speed.
Decrease spring tension.
Increase feed pressure (hard spots). Reduce
speed, increase feed pressure (scale).
Increase feed pressure by reducing spring
tension.
Increase tension to proper level.
Do not run blade at idle in/on material.
Adjust vise so it is square with the blade.
(Always clamp work tightly in vise.)
Decrease pressure.
Adjust guide bearing clearance to 0.001 inch
(0.002 inch maximum).
Gradually increase blade tension.
Move blade guide bar closer to work.
Replace blade.
Check blade speed/pulley position.
Tighten blade guide assembly.
Tighten blade guide bearing assembly.
Adjust blade tracking.
Replace worn bearing.
Reduce blade speed and feed pressure.
Replace with finer blade.
Decrease feed pressure.
Decrease tension on blade.
Replace blade guides.
Adjust blade guide bearings.
Tighten blade guide bearing bracket.
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