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Lathe Master v1.1

Handbook-optimized speed, feed-rate & spindle calculator

Units

1. Material & Geometry

2. Machine & Logic

FLOOD COOLANT
AUTO-SUGGEST FEED/DOC

3. Live Calculated Output

AWAITING DIAMETER
⚠️ STALL WARNING: INSUFFICIENT HP
Spindle Speed ? Metric: RPM = (Vc × 1000) / (π × Dia)
Imperial: RPM = (Vc × 12) / (π × Dia)
-- RPM
Surface Speed (Vc) ? Formula: Base Material Vc × Rigidity Factor × Coolant Factor × Feed/DOC Interdependence Penalty.

Note: Over-aggressive chip loads manually overridden by the user will trigger a reduction penalty in Vc to prevent thermal breakdown of the tool edge, imitating the Machinery's Handbook matrices.
-- m/min
Linear Feed Rate ? Formula: Spindle RPM × Feed per Revolution (or Thread Pitch)
-- mm/min
Required Power ? Calculated using the Material Removal Rate (MRR) and the specific cutting energy (k-factor) of the selected material.

Metric: HP = ((MRR_cm³ × UnitPower) / 1000) × 1.34
Imperial: HP = MRR_in³ × UnitPower
-- HP

Roughing Speed Ref (Vc)

Finishing Speed Ref (Vc)

Legal & Liability Disclaimer:
This software utility is provided solely for educational, research, and academic reference purposes. It is explicitly not intended to serve as a substitute for certified commercial engineering calculations, structural designs, or safety-critical evaluations. Results are generated via simplified numerical representations, and performance metrics vary based on user variables. All structural projects must be independently vetted and approved by a licensed professional structural engineer in compliance with governing local regulatory frameworks and building codes. The author and publishers decline all responsibility or liability for structural failures, property damage, or legal ramifications arising from software application.
Author Note:
Lathe Master was developed by Wouter van Zoggel.