Meet the BOSCH GW27M901 9 in. Type 27 depressed-center grinding wheel — the reliable workhorse for metal, concrete, masonry, pipeline, asphalt, and stainless steel projects. Designed for big grinders and bigger results, it pairs Bosch quality with straightforward performance, no drama required.

Key Features & Design

• Size & compatibility: 9 in diameter with a Type 27 depressed-center design for efficient grinding on flat surfaces and weld prep. Arbor options include 1/4 in and 5/8-11 in.
• Material & construction: Premium aluminum oxide grain, carefully formulated resinoid bonds, and multiple layers of long, stranded fiberglass for a robust reinforcement layer.
• Performance: Not to exceed 6,600 RPM; best used at a 30-degree angle for optimal material removal.
• Applications: Designed for metal, concrete, masonry, pipeline, asphalt, and stainless steel cutting and finishing; perfect match for Bosch grinders; also suitable for polishing, debris removal, and dust extraction in compatible workflows.
• Clarity & durability: Easy-to-read labels remain intact throughout the wheel’s life, so you always know what you’re using—even after a few sparks fly.

Specifications

• Wheel Diameter: 9 in
• Arbor: 1/4 in - 5/8-11 in
• Arbor Type: Type 27
• Grit: 30
• Material: Aluminum oxide grain
• Bonding: Resinoid
• Reinforcement: Long, stranded fiberglass
• Recommended Use: Grinding wheel with large angle grinder
• RPM: Not to exceed 6,600 RPM
• Contents: 1 Type 27 grinding wheel
• Color / Finish: N/A
• Application: Grinding