RF45 belt drive conversion plans

Description

Dimensioned drawings, 3D models (.step format, others available on request), bill of materials, and instructions for a belt drive conversion of RF45 type mills. Based on Precision Matthews PM-940CNC mill with a 1.5:1 ratio between drive and spindle pulleys.

BOM includes manufacturer, part numbers, and cost for:

• Best value new 3 HP motor and VFD, as well as instructions for sourcing a used motor.
• Three potential pulley setups (one made, two purchased).
• Spindle angular contact bearings for increased speed.

Instructions include:

• Machining of pulleys, mounting plates, and rails.
• Assembly and mounting of new motor onto mill head.
• Installing VFD with DC braking resistor (including wiring diagrams and VFD settings).
• Mounting new spindle bearings in qquill.

Includes Solidworks, .step and .pdf files of:

• Motor pulley.
• Spindle pulley (two versions).
• Motor mounting plates and rails.
• Mill head with top plate removed.