What is the recommended method used to...

Question 1 / 2707066636eed28f7522a1c51d974

Question 1 of 2707066636eed28f7522a1c51d974

What is the recommended method used to resurface an eccentric DC motor commutator?

Question 1 of 27070

What is the recommended method used to resurface an eccentric DC motor commutator?

🔍 Key Concepts

• Function and construction of a DC motor commutator • Difference between minor cleaning/burnishing and actual resurfacing/reshaping of a commutator • Proper shop practice for restoring roundness and concentricity of an eccentric rotating part

💭 Think About

• Ask yourself which method can actually change the commutator’s shape so it is truly round and concentric again, rather than just polishing or wiping the surface • Consider which choice is normally done onboard for light maintenance versus which requires machine‑shop level work • Think about what “eccentric” really means in mechanical terms and what kind of tool/machine can correct that condition

✅ Before You Answer

• Verify which options merely clean or polish the surface (no change to geometry) • Identify which option would involve removing metal uniformly from the commutator to restore roundness • Check standard marine electrical maintenance practice for badly worn or eccentric commutators versus routine servicing

Question 1 of 27070

What is the recommended method used to resurface an eccentric DC motor commutator?

burnish it with commutator stones

use a hard canvas wiper

use a hand stone

turn it down in the ship's lathe