Features
- Depressed-center profile (Type 27)
- 4-1/2 inch diameter
- 0.25 inch thickness
- Fits 5/8-11 arbor (0.625 in bore)
- 30 grit abrasive
- Aluminum oxide abrasive grain
- Maximum rated speed 13,280 RPM
- Pack quantity: 1
Specifications
| Model Number | GW27M451 |
| Specification | Type 27 |
| Diameter (In) | 4.5 |
| Bore Diameter (In) | 0.625 |
| Thickness (In) | 0.25 |
| Arbor Size | 5/8-11 |
| Grit | 30 |
| Abrasive Material | Aluminum oxide |
| Max Rpm | 13280 |
| Pack Quantity | 1 |
Related Tools
Related Articles
Depressed-center (Type 27) grinding wheel for use with angle grinders. It has a 4-1/2 inch diameter, 0.25 inch thickness, and a 5/8-11 arbor fit. The wheel uses 30-grit aluminum oxide abrasive and is rated to 13,280 RPM. Intended for grinding higher-tensile-strength materials.
Model Number: GW27M451
Project Ideas
Business
Mobile Rust and Weld Cleanup
Offer on-site grinding services for gates, fences, trailers, and structural steel: remove rust/mill scale, blend welds, and bevel edges to prepare for paint or primer. Price per hour plus consumables; upsell coating or referral to painters.
Fabrication Finishing Service
Partner with local welders and makers to handle their grind-out and surface prep. Provide consistent weld blending, beveling for fit-up, and uniform texture using 30-grit wheels on 5/8-11 grinders; charge per piece or by linear foot of weld.
Custom Ground-Metal Decor Shop
Sell ground-texture steel art panels, signage backers, and table inlays online. Use the Type 27 wheel to create repeatable patterns and textures; clear coat or powder coat for a premium finish and offer custom sizes and motifs.
Trailer and Equipment Refurb
Specialize in grinding and surface prep for utility trailers, machinery guards, and racks: remove rust, smooth repairs, and bevel edges before repaint. Offer flat-rate packages and seasonal maintenance contracts for fleets.
Hands-On Grinding Workshops
Host small classes teaching angle grinder safety, weld cleanup, beveling, and texture techniques on steel. Monetize through tuition and tool/consumable sales; partner with makerspaces to fill recurring sessions.
Creative
Ground-Metal Swirl Wall Art
Create abstract wall panels from mild steel sheet by laying out patterns and using the 4.5 inch Type 27 wheel to carve bold swirl and crosshatch textures. The 30-grit aluminum oxide removes mill scale quickly and the depressed center helps keep the wheel flat while feathering edges. Finish with a clear coat or tinted lacquer, or backlight with LEDs for depth.
Horseshoe Coat Rack
Weld reclaimed horseshoes to a flat bar to form hooks, then use the Type 27 wheel to blend welds, round sharp edges, and add a uniform industrial finish. The coarse 30-grit is ideal for shaping and smoothing before a final pass with a flap disc; add mounting holes and a matte clear finish.
Rebar Garden Sculptures
Make flowers, trellises, or abstract yard art from rebar or rod. After welding, use the depressed-center wheel to knock down high spots, remove scale, and bevel edges for a clean, cohesive look that takes paint or patina well.
Railroad Spike Hooks
Forge or cold-bend railroad spikes into hooks, then profile and bevel with the 30-grit wheel to define crisp facets and remove scale. The Type 27 profile helps keep flats true for a rugged, polished look on entryway or shop hooks.
Industrial Shelf Brackets
Fabricate heavy-duty brackets from angle and flat stock and use the grinding wheel to chamfer edges, blend welds, and create uniform brushed textures. Clear coat or blacken for a clean industrial aesthetic that pairs well with wood shelves.