Q49D type commutatorDetailed product description：

Q49D type commutator

Number of films: 21
Outer diameter: Ø 28.5 0-0.052
Inner hole diameter: Ø 12+0.022 0

Hook (lifting plate) outer diameter: 29 ± 0.15
Axial total length: 26+0.25
Reversing blade length: 23.5
Hook (wire slot) length: 5.5
Hook angle:
Mica groove length: 15.5
Mica groove depth: 1.1 ± 0.05
Mica groove width: 0.65 ± 0.03
Mica thickness: 0.5
Inner diameter of hook end sinkhole: 14.9
Hook end sinkhole depth: 3.5
Hook free protrusion diameter: 23
Hook free convex platform length: 1