VM Series Maintenance and Safety Manual 704-0212-209 Machine Components 1- 7
Spindle and Drive System
Hurco machines have a cartridge-type spindle. This spindle is precision-balanced, and
made of high-grade alloy steel. The spindle shaft (inside the cartridge) is supported by
ABEC-7 class angular contact bearings. The bearings are grease packed.
Belt-Driven Spindle
The spindle and drive system consists of a spindle, motor with encoder, pulley
arrangement, and drive unit. Different size spindles, motors, and pulleys give each
machine its unique cutting power specification.
The following figure illustrates vertical spindle and drive components.
Figure 1–2. Example of Belt-Driven Spindle and Drive
Heavy disc springs retain the tool holder in the spindle by clamping the tool holder pull
stud via a drawbar. Pneumatics release the tool holder during a tool change. A dual-piston
air cylinder supplies the necessary thrust force to the drawbar for tool release.
1 Spindle Motor
2 Air/Oil Unit
3 Tool Release Cylinder
4 Drawbar
5 Spindle Pulley
6 Spindle Belt
7 Spindle Assembly
8 Spindle Tool Holder
9 Motor Pulley
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