Product Description
**Milwaukee parts change not only by model# but also by serial number. Milwaukee's site lets you look up your tool's parts diagram. Enter Cat# and Select Service Parts. Also match Serial Number.
Milwaukee Cylinder Bushing
Model Number: 42-40-0041
The Milwaukee 42-40-0041 is a genuine OEM Cylinder Bushing for the 3059-20 M12 FUEL 3/8 in. Extended Reach Ratchet. A bushing is a precision-bored sleeve bearing that supports a rotating or sliding component on a low-friction surface; this cylinder bushing supports a shaft in the ratchet's drive mechanism, maintaining alignment and reducing metal-to-metal wear during the high-cycle motion of the ratchet head as it drives fasteners. Because it carries the load across its full bore and the ratchet runs at hundreds of cycles under torque, the bushing wears over the tool's life, and a worn, oval, or scored bushing lets the shaft develop play, which shows up as a loose or notchy ratchet action and accelerated wear on the parts it supports. Replacing it with the genuine Milwaukee OEM bushing restores the correct bore fit and smooth support, where an off-spec bushing may allow play or bind.
This bushing is identified as the Cylinder Bushing, Figure 51, on the Milwaukee service parts list for the 3059-20 M12 FUEL 3/8 in. Extended Reach Ratchet, serial R90A, bulletin PN0013638. The same 42-40-0041 bushing is shared across the M12 FUEL Extended Reach Ratchet family, the 1/2 in. 3055-20 and the 1/4 in. 3058-20, and it is also used on the M12 FUEL 1/2 in. ratchet 3054-20. Because Milwaukee uses distinct part numbers for bushings that look nearly identical but differ in bore, outside diameter, and length, order by this exact part number at the correct figure position rather than by appearance. Because Milwaukee specifies service parts by serial number as well as catalog number, verify your catalog and serial number against the official Milwaukee service parts diagram before ordering, since running production changes can alter part compatibility within the same catalog number.
Features
- Genuine Milwaukee OEM cylinder bushing
- For the 3059-20 M12 FUEL 3/8 in. Extended Reach Ratchet
- A precision sleeve bearing that supports a shaft in the ratchet drive
- Maintains alignment and reduces wear during the ratchet's high-cycle motion
- Figure 51 on the service parts diagram (bulletin PN0013638, SER R90A)
- Shared across the Extended Reach Ratchet family (1/2 in. 3055-20, 1/4 in. 3058-20)
- Also used on the M12 FUEL 1/2 in. ratchet 3054-20
- Restores the correct bore fit and smooth support
- Replace if the ratchet action is loose or notchy from a worn bushing
- Order by exact part number, since similar bushings differ in size
- Sold individually
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 42-40-0041
- Official Description: Cylinder Bushing (also listed as Bushing)
- Component Type: Ratchet drive sleeve bushing
- Primary Fitment: Milwaukee 3059-20 M12 FUEL 3/8 in. Extended Reach Ratchet, SER R90A
- Also Referenced On: M12 FUEL 1/2 in. 3055-20 and 1/4 in. 3058-20 Extended Reach Ratchets, and M12 FUEL 1/2 in. ratchet 3054-20; verify by serial number using Milwaukee's online parts lookup
- Parts Diagram Position: Figure 51 (bulletin PN0013638; Figure 64 on the 3058-20)
- Quantity: Sold individually (1 bushing)
- Part Type: Genuine Milwaukee OEM Replacement Part
Includes
- (1) Cylinder Bushing
The ratchet and its other components are NOT included and are sold separately. Order by exact part number and verify by serial number using Milwaukee's online parts lookup before ordering, since similar-looking bushings are not interchangeable.
