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.