HM lock nuts are used to locate bearings onto a shaft. They have metric trapezoidal threads and eight equally spaced slots located around their circumference to accommodate an impact spanner. They should be locked by a locking clip to prevent unintentional loosening. HM lock nuts can be reused, provided they are not damaged.
| G |
Tr 420×5
|
Thread |
|---|---|---|
| d3 |
490 mm
|
Outside diameter |
| B |
52 mm
|
Width |
| d1 |
462 mm
|
Diameter locating side face |
| d2 |
439 mm
|
Pitch diameter threaded holes for locking clip |
| B5 |
66 mm
|
Width including locking clip |
| b |
32 mm
|
Width locating slot |
| h |
14 mm
|
Depth locating slot |
| Mass lock nut |
19.4 kg
|
| Associated spanner |
TMFN 64-80
|
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