BandSaw FAQ

PROBLEM

CAUSE

SOLUTION

A. Saw dulls 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 ¡§C in on new blade width

8.Improper saw guides for band

9. Inferior quality blade

Reduce speed

Blade might be rubbing, try increasing feed rate

Use finer pitch

Apply at point of cut

Re ¡§C fit band correctly

Keep teeth engaged. Use positive feed pressure

Reduce feed rate by a 1/3 on first few cuts

Replace with correct ones

Replace with B90 M42

B. Saw loses set

1. Saw speed too fast

2. Saw rubbing against vice or tunning deep in guides

3. Not using coolant

4. Blade not set square to vice

Dectease speed prematurely

Check cutting path of blade and size of guides

Try to introduce it

Adjust guides to vice to ensure blade runs square

C. Blade develops camber.
Cust 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 bening cut

7. Set removed by guides

Cheak chip formation and re ¡§C adjust

Adjust closer to the work

Tilt wheel for proper tracking

Re ¡§C adjust

Use coarset pitch

Dectease feed rate

Adjust or chamfer guides

D. Band twisting

1. Saw is binding in cut

2. Saw guide arms positioned too far apart

3. Insufficient tension

Decrease feed rate ¡§C check blade tensioning is sufficient

Adjust correctly ¡§C as close to work as possible

Increase band tension

E. Band Saw blade gullets loading up

1. Too fine pitch

2. Band speed too fast

3. Cutting dry

4. Chip brush not working

Use coarset pitch

Reduce speed and check chip formation

Use coolant

Replace or repair

F. 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

G. Band Saw becomes scored

1. Saw guides worn

2. Guides out of alignment

3.Guides too tight

4.Guides not receiving lubrication

Replace with a blade

Adjust

Adjust

Check lubricating system

H. 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 ¡§C adjust

Repair or replace with a blade

Reduce feed rate and check chip formation

Select correct tooth

Reduce cutting rate

Adjust or chamfer guides

I. Saw vibrates in cut

1. Wrong speed for material thichness

2. Insufficient blade tension

3. Pitch too coarse

4. Incorrect feed pressure

5. Work piece not held secure

6. Incorrect tooth form

7. Machine bearings worn

8. Machine hydrauics faulty

See section on recommended speed and feed, page 6 & 7

Increase tension

Select finer pitch

Adjust, check chip formation

Clamp firmly

Use Variable Pitch

Overframe Band Saw Machine

Overhaul machine

J. Saw blade breaks

1. Speed to low for feed being used

2. Pitch too coarse

3. Excessilve blade tension

4. Guides too tight or out of adjustment

5. Carck at weld

6.Band speed too fast

Increase speed or decrease prematurely

Use finer pitch

Reduce tension

Re ¡§C adjust

Check welding technique or return to Somta for guaranteed weld

Reduce band speed

K. Blade stalls in work piece

1. Feed pressure to heavy

2. Guides out of line

3. Bach 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 under (B)

Re ¡§C clamp firmly

Examine under (H)

Replace with B90 M42

L. 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

7. Band teeth encountering sharp edge

Use finer pitch on thin section

Tighten work piece to prevent vibration

Use coolant where possible

Use coarser pitch or higher viscosity

Lubricant or attach brush to remove chip

Reduce feed pressure

Increase speed

Present flat face to cutting edge

M. Band Saw blade squeals while sawing

1. Too low feed or blade rubbing

2. Blade worn out

Increase feed rate

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