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Milwaukee® Front Case Sub-Assembly (For Use With 18 V Square And Hex Impact Driver)

Milwaukee® Front Case Sub-Assembly (For Use With 18 V Square And Hex Impact Driver)

By
Milwaukee Electric Tool Corporation

Airgas Part #:MET28-50-0900

Manufacturer Part #:28-50-0900


$24.39 /Each
Each

Item Details

  • The Milwaukee Electric Tool Corporation 28-50-0900 Front Housing Assembly (also known as the Front Case Sub-Assembly, Gearcase Assembly with Bushing, or Front Impact Mechanism Housing) is a genuine original equipment manufacturer (OEM) replacement component. It serves as the forward structural shell of the tool body that encloses the impact mechanism, anvil, and drive interface for early-generation Milwaukee M18 18V cordless impact tools. This component acts as both a load-bearing chassis and a containment shield, absorbing and redirecting the rotational impact forces generated during high-torque fastening applications to maintain structural integrity and keep the impact mechanism correctly aligned.

Features

  • Genuine OEM replacement part ensuring correct structural fit and impact mechanism interface
  • Die-cast aluminum alloy construction provides structural rigidity and passive heat dissipation
  • Integrated press-fitted fluid-impregnated sintered bronze bushing stabilizes the output anvil during high-torque, non-axial loading
  • Protects internal components by acting as a damping shroud for the hammering block and spring assembly
  • Maintains axial alignment to prevent radial play or runout of spinning parts
  • Seals specialized gear lubricants inside the tool while blocking external debris like concrete dust, metallic filings, and moisture

Specifications

  • Manufacturer: Milwaukee Electric Tool Corporation
  • Part Number (MPN): 28-50-0900
  • Alternative Descriptions: Front Case Sub-Assembly, Gearcase Assembly with Bushing, Front Impact Mechanism Housing
  • Zoro SKU: G716515840
  • Neobits Item Number: 10235748
  • Primary Substrate Material: Die-cast aluminum alloy
  • Internal Support: Integrated, press-fitted fluid-impregnated sintered bronze bushing
  • Operating Speed Rating: Up to 3,200 RPM under no-load conditions
  • Impact Frequency Rating: Up to 3,200 IPM under maximum load
  • Kinetic Energy / Torque Threshold: Up to 1,400 in-lbs (116.6 ft-lbs / 158 Nm)
  • Fastener Interface: Machined perimeter flange for standardized Milwaukee machine screws
  • Net Weight: 0.42 lbs (0.19 kg)
  • Packaging Dimensions: 4.0" x 3.5" x 3.0"
  • Required Lubricant: Milwaukee Type "J" Industrial Gear Grease (No. 49-08-4220)
  • Fastener Torque Spec: 18 ± 2 in-lbs (21 ± 2 kg/cm)
  • Compatible Tool Models: - Milwaukee M18 1/4" Hex Impact Driver 2650-20 (Serial runs: 2650-20, 2650-059-(D39A), 2650-059-(D39B), 2650-20(B55A), 2650-20(B55B), 2650-20(B55C), 2650-21(B55A), 2650-21(B55B), 2650-21(B55C), 2650-22(B55A), 2650-22(B55B), 2650-22(B55C)) - Milwaukee M18 3/8" Square Impact Wrench 2651-20 (Serial runs: 2651-20, 2651-059-(D68A), 2651-059-(D68B), 2651-059-(D68C), 2651-20(B77A), 2651-20(B77B), 2651-20(B77C), 2651-20(B77D), 2651-22(B77A), 2651-22(B77B), 2651-22(B77C), 2651-22(B77D)) - Milwaukee M18 1/2" Square Impact Wrench 2652-20 (Serial runs: 2652-20, 2652-059-(D69A), 2652-059-(D69B), 2652-059-(D69C), 2652-20-(B78A), 2652-20-(B78B), 2652-20-(B78C), 2652-22(B78A), 2652-22(B78B), 2652-22(B78C))

Applications

  • Automotive maintenance and repair including vehicle undercarriages, suspension assemblies, brake caliper brackets, and wheel lug servicing
  • Industrial assembly and production lines for continuous fastening into pre-tapped metal configurations or wood frames
  • Mechanical, Electrical, and Plumbing (MEP) construction for driving concrete anchors, assembling unistrut frames, and mounting industrial pipe hangers
  • Facilities management and field maintenance tasks requiring compact, battery-powered impact fastening equipment

Product Attributes

Product Type

» Front Case Sub-Assembly

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