FAQ – Trouble Shooting

Bandsaw Blades Related Questions
PROBLEM CAUSE SOLUTION
Saw blunts prematurely 1. Band speed too high
2. Feed rate too light
3. Too coarse pitch
4. Coolant improperly directed
5. Band teeth running in wrong direction
6. Saw idling through cut
7.Improper break in on new blade
8.Improper saw guides for band
Reduce speed
Blade might be rubbing, try increasing feed rate
Use finer pitch
Apply at point of cut
Re fit band correctly
Keep teeth engaged. Use positive feed pressure
Reduce feed rate by a 1/3 on first few cuts
Adjust or replace with correct ones
Saw loses set 1. Saw speed too fast
2. Saw rubbing against vice or rubbing on guides
3. Not using coolant
4. Blade not set square to vice
Decrease speed
Check cutting path of blade and size of guides. Correct as required
Introduce a quality coolant
Adjust guides to vice to ensure blade runs square
Blade develops camber or
cuts off to one side. Band Saw running out of square
1. Feed pressure too heavy
2. Saw guides too far apart
3. Blade riding against flange on wheel
4. Roller guides not properly adjusted
5. Band Saw pitch too fine
6. Hard inclusion in material being cut
7. Set removed by guides
Check chip formation and re adjust
Adjust closer to the work
Tilt wheel for proper tracking
Re adjust
Use coarser pitch
Decrease feed rate
Adjust or chamfer guides
Band twisting 1. Saw is binding in cut
2. Saw guide arms positioned too far apart
3. Insufficient tension
Decrease feed rate, check blade tensioning is sufficient
Adjust correctly as close to work as possible
Increase band tension
Band Saw blade gullets loading up. 1. Too fine pitch
2. Band speed too fast
3. Cutting dry
4. Chip brush not working
Use coarser pitch
Reduce speed and check chip formation
Use coolant
Replace or repai
Chips welding to Band Saw blade teeth 1. Feed rate too heavy
2. Chip brush out of alignment
3. Coolant wrong type, improperly mixed or improperly applied
Reduce feed rate and check chip formation
Adjust chip brush
Investigate and change coolant if necessary
Band Saw becomes scored 1. Saw guides worn
2. Guides out of alignment
3.Guides too tight
4.Guides not receiving lubrication
Replace guides and blade
Adjust
Adjust
Check lubricating system
Chips welding to Band Saw blade teeth 1. Feed rate too heavy
2. Chip brush out of alignment
3. Coolant wrong type, improperly mixed or improperly applied
Reduce feed rate and check chip formation
Adjust chip brush
Investigate and change coolant if necessary
Band Saw becomes scored 1. Saw guides worn
2. Guides out of alignment
3.Guides too tight
4.Guides not receiving lubrication
Replace guides and blade
Adjust
Adjust
Check lubricating system
Crooked cutting or cutting skew 1.Guides out of adjustment
2. Guides worn
3.Feed rate too heavy
4. Too fine a pitch
5. Set taken off one side due to hard inclusion in material
6.Set removed by guides
Re adjust
Repair or replace with a blade
Reduce feed rate and check chip formation
Select correct tooth
Reduce cutting rate or replace with new blade, be sure to start cut in new piece of material.
Adjust or chamfer guides
Saw vibrates in cut Saw vibrates in cut
1. Wrong speed for material thickness
2. Insufficient blade tension
3. Pitch too coarse
4. Incorrect feed pressure
5. Work piece not held secure
6. Machine bearings worn
7. Machine hydraulics faulty
See section on recommended speed and feed
Increase tension
Select finer pitch
Adjust, check chip formation
Clamp firmly
Repair Band Saw Machine
Overhaul machine
Saw blade breaks 1. Speed to low for feed being used
2. Pitch too coarse
3. Excessive blade tension
4. Guides too tight or out of adjustment
5. Crack at weld
6.Band speed too fast
Increase speed
Use finer pitch
Reduce tension
Re adjust
Check welding technique or return to us for guaranteed weld
Reduce band speed
Blade stalls in work piece 1. Feed pressure to heavy
2. Guides out of line
3. Back of blade flanging
4. Insufficient blade tension
5. Loss of tooth set
6. Movement of work piece
7. Cutting out of square
8. Blade worn out
Decrease feed pressure
Adjust guides
Check guide and repair or reduce feed rate
Increase tension
Examine “saw loses set”
Re clamp firmly
Examine “blade develops camber or cuts off to one side”
Replace with new
Saw teeth rip out 1.Pitch too coarse
2. Work not tightly clamped
3. Sawing dry
4. Gullets loading (Overload with swarf)
5. Excessive feed pressure
6. Too slow speed
Use finer pitch on thin section
Tighten work piece to prevent vibration
Use coolant where possible
Use coarser pitch or higher band speed
Reduce feed pressure
Increase speed
Band Saw blade squeals while sawing 1. Too low feed or blade rubbing
2. Blade worn out
Increase feed rate, increase coolant concentration.
Replace blade
N. Slow cutting 1. Band speed too slow or insufficient feed
2. Teeth too fine
3. Lack of coolant
4. Band nearing end of life
Increase speed or feed rate
Use a coarser pitch blade
Use coolant
Replace with a blade
O. Bad surface finish on work piece 1. Teeth too coarse
2. Band speed too slow
3. Feed rate too heavy
4. Defective machine or worn bearing
5. Lack of coolant
6. Vibration
Select finer teeth
Increase speed
Decrease feed
Repair machine
Increase coolant supply
Check condition of Band Saw machine
P. Band Saw making bow Shaped cut 1. Feed pressure too heavy
2. Insufficient guide support to band
3. Pitch too fine
4. Insufficient blade tensioning
5. Band guides worn or misaligned
Decrease feed pressure
Adjust guides as close as possible to material being cut
Select coarser tooth pitch
Increase blade tension
Adjust correctly
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