M20 Roller
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| Package | Wooden case | Weight(KG) | 2.1 | |
| Specification | Surface treatment | |||
| Adopt cover plate to improve safety factor | Black coating | |||
| Galvanized | ||||
| Overall dimension(MM) | ||||
| Major diameter/D | Ø88 | Step height/h | 5 | |
| Minor diameter/d | Ø74 | Assemble height/L | 30.5-34.5(4) | |
| Thickness/H | 49 | Eccentricity/P | 3.5 | |
| Arc/R | R39 | External thread/M | M20 | |
| Step outside diameter/Ø | Ø40 | Thread length/T | 56 | |
| Dimension drawing | Description | |||
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Used in GJJ hoist and other hoist with 650 mast section | |||
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