Understanding centerless grinding Which statements correctly describe essential features of centerless grinding used for high-rate production?

Introduction / Context:
Centerless grinding is widely used for producing high-precision cylindrical parts such as pins, rollers, and shafts. Unlike between-centers grinding, the part is supported by a work-rest blade and driven by a regulating wheel, enabling continuous feeding and excellent throughput.

Given Data / Assumptions:

• Through-feed or infeed (plunge) centerless configurations.
• Work-rest blade used for support, grinding wheel for cutting, regulating wheel for rotation and feed control.
• Production environment where continuous processing is valued.

Concept / Approach:
Because the work is supported along a line generatrix on the blade, the effective support extends along its length, not just at the ends. The regulating wheel both rotates the part and controls the axial feed in through-feed mode, so no chucks or centers are required. This geometry enables continuous, high-rate production.

Step-by-Step Solution:
Assess support: the work-rest blade and wheel pair provide full-length line support → Statement (A) is correct.Assess process mode: through-feed allows continuous part flow → Statement (B) is correct.Assess fixturing: absence of centers/chucks, the regulating wheel drives the work → Statement (C) is correct.Hence, all statements are true → (D).

Verification / Alternative check:
Typical centerless lines feed bar stock continuously, with minimal setup time and excellent repeatability for diameter control.

Why Other Options Are Wrong:

• (E) is incorrect; long and short parts can be ground, with guides and supports as needed.

Common Pitfalls:
Confusing centerless with cylindrical grinding between centers; misadjusting work-rest blade height causing lobing; overlooking the role of the regulating wheel in both rotation and feed.

Final Answer:
all of the above