Product Overview
The 316054990 Bevel Gear Set w. Pinion is a precision-engineered direct-fit transmission replacement for 125mm angle grinders built on the WEA 17-125 Quick platform. This complete bevel gear set includes both the main bevel gear and the matching pinion as a pre-matched assembly – eliminating the guesswork of individual component selection and ensuring correct tooth contact pattern from the first installation.
Designed for professional repair technicians and equipment maintenance specialists, this gear set restores factory-spec power transmission to tools exhibiting grinding stalling, loss of torque under load, excessive gear noise, or complete drive failure. The case-hardened alloy steel construction and precision-ground spiral bevel tooth profiles deliver the durability required for continuous heavy-duty grinding and cutting operations. Metabo’s gear housing can be rotated in 90° steps for left-handed operation or cutting applications, and this gear set maintains that same OEM fitment standard[reference:0][reference:1].
Critical Note on Part Number Identification: 316054990 is the OEM part number for this bevel gear set with pinion, referenced in Metabo parts diagrams as “Bevel gear w.pinion” or “Corona con pignone”[reference:2][reference:3]. This listing supplies the complete set – bevel gear and pinion as a matched pair – which replaces both individual components in a single installation.
💡 Pro Tip – Pre-Installation Diagnostic: Before tearing into the gear case, perform a no-load amp draw test with a clamp meter. A healthy 1,700W angle grinder should draw approximately 7-9A at no load (at 230V). Draws exceeding 11A with the disc spinning freely indicate either failing gearbox bearings or a gear set with excessive tooth wear – both resolved by replacing this 316054990 bevel gear set with pinion. Also inspect the friction washer set (316066830) while the gear case is open – if worn, it should be replaced simultaneously[reference:4]. Always disconnect the tool from mains power and allow the motor to cool before beginning disassembly.
Diagnostic & Fitment – When to Replace
Specification Comparison
| Specification | Worn / Generic Aftermarket | FixPartHub Precision Replacement ✅ |
|---|---|---|
| Tooth Hardness | Surface-hardened only – rapid wear | Case-carburized, through-hardened core |
| Tooth Profile Accuracy | Inconsistent – noise & vibration | Precision-ground spiral bevel – smooth meshing |
| Material Grade | Low-grade carbon steel | High-grade alloy steel – extended service life |
| Set Matching | Individual components – mismatch risk | Pre-matched bevel gear + pinion – correct contact pattern |
| Compatibility | Vague or incorrect fitment claims | WEA 17-125 Quick – direct-fit guaranteed |
Teardown & Replacement Workflow
Compatibility – Cross-Reference & OEM Part Numbers
Compatible with WEA 17-125 Quick and WE 17-125 Quick angle grinders. Referenced as item 52 in OEM parts diagrams[reference:7]. Also compatible with models 600534380 and 600534390[reference:8]. The gear housing can be rotated 90° for left-handed operation or cutting applications[reference:9].
Diagnostic Q&A
❓ Q: My grinder runs but the disc doesn’t turn – is this definitely the bevel gear set?
A: Not always. First verify that the spindle lock isn’t engaged and the disc isn’t seized. If the motor spins freely but the disc remains stationary, the gear set has likely stripped – either the bevel gear or the pinion has failed. Remove the gear case and inspect both gears – any missing teeth or excessive wear confirms the need for replacement with the 316054990 set.
❓ Q: What is the correct part number for this bevel gear set – is it 316054990?
A: Yes. 316054990 is the OEM part number for the bevel gear with integrated pinion. It is referenced in Metabo parts diagrams as “Bevel gear w.pinion” (English) or “Corona con pignone” (Italian) and is listed as item 52[reference:10][reference:11]. This listing supplies the complete set, replacing both components in a single installation.
❓ Q: What grease should I use when reinstalling the bevel gear set?
A: Use a high-temperature, lithium-based or synthetic EP (extreme pressure) grease rated for gear applications – NLGI Grade 2 with molybdenum disulfide or similar anti-wear additives. Apply approximately 15-20g evenly across the bevel gear teeth and pinion. Avoid over-greasing, which can cause overheating and premature seal failure.
❓ Q: Will this gear set fit my WEA 17-125 Quick angle grinder?
A: Yes. The 316054990 bevel gear set with pinion is the OEM replacement for WEA 17-125 Quick and WE 17-125 Quick angle grinders. It is designed for the 1,700W, 11,000 RPM platform with 125mm disc diameter[reference:12].
Safety Notes
- 🔴 Always disconnect the tool from mains power before beginning any disassembly or gear replacement procedure.
- ⚡ Allow the tool to cool completely before handling internal components – gears and gear case can reach high temperatures during operation.
- 🔧 Use correct torque values – gear case screws typically require 2.0-2.5 Nm (18-22 in-lbs). Over-torquing can strip housing threads or distort the gear case alignment.
- 🧤 Wear cut-resistant gloves when handling gears – machined tooth surfaces can have sharp edges.
- 📐 Verify gear mesh before final assembly – the bevel gear and pinion should rotate smoothly with no binding or tight spots.
- ✅ Perform a no-load test before reinstalling the disc and guard – verify smooth operation and correct rotation direction.
A: Perform a “stall test” under load. With a fresh grinding disc installed, apply moderate pressure to a scrap piece of metal. If the grinder bogs down significantly or the disc stops rotating while the motor continues to run, the gear set is slipping – indicating worn teeth on the bevel gear or pinion. Additionally, listen for a high-pitched whine or grinding noise during free spinning – this indicates excessive tooth wear or pitting.
A: This bevel gear set with pinion is compatible with WEA 17-125 Quick, WE 17-125 Quick, and related 1,700W 125mm angle grinder platforms. It is listed as item 52 in OEM parts diagrams and is also compatible with models 600534380 and 600534390.
A: Always replace both the bevel gear and pinion as a matched set. Gears wear together and develop a specific tooth contact pattern. Mixing a new gear with a worn pinion (or vice versa) will result in improper mesh, accelerated wear, and premature failure of both components. This 316054990 listing includes both as a complete set.
