Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukee's website please click here:
Milwaukee Bushing
Model Number: 42-40-0018
The Milwaukee 42-40-0018 is a genuine OEM Bushing service part for use in compatible Milwaukee tools. A bushing is a precision-bored sleeve bearing that supports a rotating or sliding shaft, providing a low-friction wear surface between the moving component and the housing or frame that carries it. Unlike a ball bearing, a bushing carries its load across the full bore surface rather than through rolling elements, which makes it well suited to positions where space is tight, loads are moderate, and the shaft either rotates at lower speed or moves through a limited arc. Because the bushing is intentionally the softer of the two mating surfaces, it is designed to absorb wear that would otherwise be transferred to the shaft, the housing bore, or the gear train it supports. Over the service life of a tool the bore gradually opens up from abrasive dust ingress, grease breakdown, and normal cycling, and once clearance exceeds the design tolerance the shaft begins to run off center. That misalignment shows up as shaft wobble, vibration, uneven gear mesh, accelerated seal wear, and audible noise under load. Replacing a worn bushing with the correct genuine Milwaukee OEM part restores the original bore diameter and running clearance, which is the only reliable way to bring the supported shaft back into concentric alignment and stop the wear from spreading into more expensive adjacent components.
Because Milwaukee Tool specifies replacement parts by both catalog number and serial number, always verify your tool's serial number against the official Milwaukee service parts diagram before placing your order, since running production changes can alter part compatibility within the same catalog number. Milwaukee uses distinct part numbers to differentiate bushing bore diameter, outside diameter, length, flange configuration, and material, and bushings that look nearly identical side by side are frequently not interchangeable, so order by the exact part number shown at the correct figure position on your tool's service parts diagram rather than by visual comparison. This bushing is sold individually. Some Milwaukee assemblies use two or more bushings in the same position or use a matched pair at opposite ends of a shaft, and where that is the case both should be replaced at the same time so the shaft is supported by two surfaces with equal wear. Retaining hardware, snap rings, washers, seals, and shaft components are not included with this bushing and are sold separately, so refer to your tool's parts diagram for the correct part numbers and required quantity. Lubricant is also sold separately, and Milwaukee specifies the correct grease type for each application directly on the service parts bulletin.
Features
- Genuine Milwaukee OEM service part, not an aftermarket substitute
- Precision-bored sleeve bearing surface supports rotating or sliding shaft components
- Manufactured to Milwaukee factory tolerances for correct bore diameter and running clearance
- Restores concentric shaft alignment and eliminates play caused by a worn bore
- Acts as the designated wear surface, protecting the shaft and housing bore from damage
- Direct-fit replacement requiring no modification, machining, or reaming
- Reduces vibration, gear noise, and uneven gear mesh caused by shaft wobble
- Prevents secondary wear from spreading to bearings, seals, gears, and housings
- Sold individually so you order only the quantity your repair requires
- Compatible with multiple Milwaukee platforms when verified by catalog and serial number
- Correct replacement interval is at any teardown where bore wear or shaft play is present
- Backed by Milwaukee OEM quality control for consistent fit across production runs
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 42-40-0018
- Official Description: Bushing
- Component Type: Sleeve Bearing and Shaft Support Component
- Primary Fitment: Verify against your tool's service parts diagram by catalog number and serial number
- Also Referenced On: Confirm additional applications using Milwaukee's online parts lookup
- Parts Diagram Position: Refer to the figure number listed on your tool's service parts bulletin
- Quantity: Sold individually, (1) per package
- Part Type: Genuine Milwaukee OEM Replacement Part
Includes
- (1) Milwaukee 42-40-0018 Bushing
Retaining hardware, snap rings, washers, seals, and shaft components are NOT included and are sold separately - refer to your tool's parts diagram for the correct part numbers and required quantity. Grease and lubricant are NOT included and are sold separately, and the required lubricant type is specified on the Milwaukee service parts bulletin for your tool. Always verify by serial number using Milwaukee's online parts lookup before ordering.
