Product Description
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Milwaukee Beveled Internal Retaining Ring
Model Number: 34-80-2021
The Milwaukee 34-80-2021 Beveled Internal Retaining Ring is a genuine OEM replacement service fastener used on the Milwaukee 1680-20 Super Hawg 1/2 in. Right Angle Drill (serial codes 407B and 407C), Milwaukee's iconic corded 120V AC right-angle drill built for plumbers, electricians, mechanical contractors, and general contractors drilling large-diameter holes through framing members, joist bays, and other tight-clearance drilling applications where a conventional straight-body drill cannot fit. The 34-80-2021 may also fit additional Milwaukee tool platforms using the same retaining ring specification. The retaining ring is the snap-fit internal ring that installs into a machined groove in the bore of the gearcase or motor housing, providing the axial retention that holds shafts, bearings, or internal components in position against thrust loads generated during high-torque drilling operations. The beveled edge design is the defining feature: the beveled cross-section provides self-centering during installation, delivers improved contact against the retained component, and delivers higher retained-load capacity compared to conventional flat retaining rings of the same diameter.
On the 1680-20 Super Hawg specifically, the retaining ring is critical to the right-angle gearcase design that gives the tool its unique capability. The right-angle gearcase uses multiple internal shafts including the motor pinion, bevel gear assembly, and spindle output, all of which require axial retention against the significant thrust loads generated when drilling large-diameter self-feed bits, auger bits, hole saws, and other high-torque accessories through structural lumber. A missing, broken, deformed, or fatigued retaining ring can allow internal shafts or bearings to shift axially under load, causing gear misalignment, accelerated bearing wear, gear tooth damage, and in severe cases catastrophic gearcase failure requiring complete gearcase assembly replacement. Replacing the retaining ring with this OEM service part restores correct axial retention at the engineered Milwaukee specification. The 34-80-2021 is often replaced during broader gearcase service that may also include inspection or replacement of the Milwaukee 02-04-1204 Bearing (Radial Ball Bearing with 2 Seals) and other internal 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 ordering, and confirm the quantity of retaining rings required at your specific service location. Verify by serial number using Milwaukee's online parts lookup before ordering to confirm correct fitment.
Features
- Genuine Milwaukee OEM replacement service fastener, direct factory part for the 34-80-2021 reference
- Beveled internal retaining ring for axial retention of shafts, bearings, and internal components
- Self-centering beveled cross-section design for correct installation and load contact
- Higher retained-load capacity than conventional flat retaining rings of the same diameter
- Confirmed fitment on the Milwaukee 1680-20 Super Hawg 1/2 in. Right Angle Drill (Serial 407B, 407C)
- May also fit additional Milwaukee tool platforms using the same retaining ring specification
- Critical for gearcase axial retention against high-torque drilling thrust loads
- Prevents gear misalignment, accelerated bearing wear, and gear tooth damage
- Prevents catastrophic gearcase failure from internal component shifting under load
- Companion service part to the Milwaukee 02-04-1204 Bearing (Rad 2SE) for 1680-20 gearcase service
- Restores correct axial retention after wear, breakage, deformation, or fatigue
- Manufactured to Milwaukee factory tolerances and material specifications
- Direct-fit replacement, no modification required for installation
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 34-80-2021
- Official Description: Beveled Retaining Ring (Beveled Internal Retaining Ring)
- Component Type: Internal Snap-Fit Axial Retention Ring
- Cross-Section: Beveled (self-centering, higher retained-load capacity)
- Ring Type: Internal (installs in bore of gearcase or housing)
- Confirmed Compatible Model: Milwaukee 1680-20 Super Hawg 1/2 in. Right Angle Drill (Serial 407B, 407C)
- Tool Category: Milwaukee Corded 120V AC Right Angle Drills (may fit additional Milwaukee platforms - verify by serial number)
- Function: Axial retention of shafts, bearings, and internal components against thrust loads
- Companion Service Part: Milwaukee 02-04-1204 Bearing Rad 2SE (Radial Ball Bearing, 2-Seal) for the 1680-20 gearcase (sold separately)
- UPC: 045242099740
- Quantity: Sold individually, 1 retaining ring per order
- Part Type: OEM Service Replacement Fastener
Includes
- (1) Milwaukee 34-80-2021 Beveled Internal Retaining Ring
