Blade Breakage Prematurely Dull Teeth Inaccurate Cut Band

Blade Effect
Blade Breakage
Straight break indicates fatigue.
Prematurely Dull Teeth
Inaccurate Cut
Band Leading in Cut
Chip Welding
Teeth Fracturing - Back
Probable Cause
Solution
Incorrect blade
Check tooth selection
Band tension too high
Reduce band tension, refer to operator’s manual
Excessive feed
Reduce feed pressure
Incorrect cutting fluid
Check coolant recommendations
Wheel diameter too small for blade width
Use narrower blade
Worn or chipped pressure block
Replace worn pressure blocks
Blade rubbing on wheel flange
Adjust wheel alignment
Teeth in contact with work before starting saw
Allow blade clearance above work
Side guides too tight
Refer to operator’s manual
Blade on machine backwards
Install blade correctly
Improper blade break-in procedure
Refer to recommended procedures
Hard material or heavy surface scale
Check material hardness and surface condition
Material is work-hardening
Increase feed pressure
Improper cutting fluid or mix ratio
Follow coolant mixing procedures
Speed or feed too high
Check cutting recommendations
Guide arms too far apart
Adjust guide arms closer to material
Blade worn out
Replace blade
Over or under feeding
Check cutting recommendations
Improper tooth pitch
Use proper tooth selection
Cutting fluid not applied properly
Adjust coolant nozzles
Too many teeth for material cross section
Use proper tooth selection
Guides worn or loose
Tighten or replace guides
Over feeding
Check cutting recommendations
Low band tension
Refer to operator’s manual
Tooth set damaged
Check material hardness
Guide arms loose or space too wide
Adjust guides and guide arms
Worn or missing chip brush
Replace or adjust chip brush
Improper or lack of cutting fluid
Check coolant flow and fluid type
Wrong coolant ratio
Check coolant type and ratio
Excessive feed or speed
Reduce feed or speed
Incorrect blade pitch
Use proper tooth selection
Saw guides not properly adjusted
Align or adjust saw guides
Incorrect feed or speed
Refer to cutting recommendations
Incorrect blade
Use proper blade type and pitch
Material moved in vise
Inspect and adjust vise
Indexing while blade in work
Adjust index sequence
Blade not high enough before index
Adjust height selector
Saw head drifts into work while neutral
Check hydraulic cylinder
Back of tooth indicates spinning in vise.
Irregular Break
Indicates material movement.
Blade Effect
Teeth Stripping
Wear on Back of Blade
Rough Cut
Probable Cause
Solution
Improper blade break-in procedure
Follow proper break-in procedure
Speed too slow
Refer to cutting recommendations
Feed pressure too high
Reduce feed pressure
Tooth jammed in cut
Do not enter new blade in that cut
Poor cutting fluid application or ratio
Adjust coolant flow and ratio
Hard material or heavy scale
Check material or surface hardness
Wrong blade pitch
Use proper tooth selection
Work spinning or loose nested bundles
Tighten vises or use nesting clamps
Blade on backwards
Install blade correctly
Excessive back-up guide preload
Adjust pressure blocks
Low blade tension
Refer to operator’s manual
Incorrect blade (carbon steel type)
Switch to a bi-metal blade
Excessive feed rate or pressure
Reduce feed rate or pressure
Damaged or worn pressure block
Replace pressure block
Guide arms spaced too far apart
Adjust guide arms closer to work
Blade rubbing band wheel flanges
Adjust wheel alignment
Dull or damaged blade
Install new blade
Incorrect feed or speed
Refer to cutting recommendations
Blade not supported properly
Adjust or tighten guide arms
Low blade tension
Refer to operator’s manual
Incorrect tooth pitch
Use proper tooth selection
Washboard surface, vibration and/or chatter
Guide arms too far apart
Adjust guide arms closer to material
Wear Lines - Loss of Set
Saw side guides too tight
Adjust guides properly
Blade riding too high in guide
Adjust rollers or pressure blocks
Blade teeth riding on band wheel surface
Adjust tracking or replace wheel
Wrong blade width for machine
Refer to operator’s manual
Chips being carried back into cut
Replace or adjust chip brush
Worn or damaged pressure block
Replace pressure block
Insufficient coolant flow
Adjust coolant flow
Blade binding in cut
Adjust feed or use heavy set blades
Side guides are too tight
Adjust guides
Work loose in vise
Adjust vise
Feed too heavy
Reduce feed pressure
Guide arms too far apart
Adjust guide arms closer to material
Incorrect blade
Use proper tooth selection
Heavy feed or too fast speed
Refer to cutting recommendations
Lack of cutting fluid
Adjust coolant flow or ratio
Blade installed backwards
Install blade correctly
Material loose in vise
Adjust vise
Incorrect tooth pitch
Use proper tooth selection
Feed too heavy
Reduce feed rate
Speed too fast
Refer to cutting recommendations
Twisted Blade
Contour sawing
Blade Wear
Teeth blued.
Teeth Fracturing - Front
Front of tooth indicates
work spinning in vise.