Why it hardens
Plastic deformation and heat can harden the surface ahead of a rubbing tooth.
Pitch selection
Keep enough teeth engaged to avoid snagging but enough gullet to form and evacuate chips.
Stop when the blade is dull
Increasing force on a glazed blade usually worsens heat and accuracy.
Method for this decision
- Identify the stainless section and choose a bi-metal or carbide blade rated for its thickness and saw.
- Clamp firmly, select the approved lower speed, and keep enough teeth engaged to avoid snagging.
- Maintain pressure that makes chips; stop at glazing, rising heat, or a dull edge instead of forcing through.
Worked example
Example: a timid feed can polish a stainless surface and harden the layer ahead of the tooth. Increasing force after that point usually creates more heat; a sharp blade and a fresh cut are the correction.
Limits and stop conditions
Stainless alloys and fluids vary. Use only lubricant, speed, and PPE permitted by the tool and workplace rules; never treat a pitch suggestion as a guarantee against work hardening.