Centreless grinding setup: What is the typical surface speed range of the regulating (control) wheel that drives and guides the workpiece?

Introduction / Context:
In centreless grinding, the workpiece is supported between a high-speed grinding wheel and a slower, rubber-bonded regulating wheel. The regulating wheel sets work speed, provides axial feed (in through-feed mode), and ensures steady control for accuracy and roundness. Selecting the proper regulating wheel surface speed is essential for stability and surface finish.

Given Data / Assumptions:

• Conventional through-feed or in-feed centreless grinding machine.
• Typical industrial ranges for steel components.
• Rubber or resin-bonded regulating wheels with controllable inclination angle.

Concept / Approach:
The regulating wheel must run much slower than the grinding wheel (which commonly runs in the range of 1800–3000 m/min or more). Practical handbooks specify a typical regulating speed window wide enough to maintain traction and allow controlled feed without burning or chatter.

Step-by-Step Solution:

Verification / Alternative check:
Machine tool manuals and process sheets list regulating wheel surface speeds in the tens of m/min, confirming the stated range.

Why Other Options Are Wrong:

• 5–15 m/min: often too slow, risks loss of control and productivity.
• 60–90 or 90–120 or above: too fast for regulating function; may cause instability and excessive feed.

Common Pitfalls:
Confusing grinding wheel speed with regulating wheel speed; they differ by an order of magnitude.

Final Answer:
15 to 60 m/min