7″ 18-Segment Bi-Turbo Cup Wheel — 120/140 Grit

This U.S. Saws 7″ premium spiral bi-turbo cup wheel is the fine metal-grinding step in the polishing process — most commonly used on the TC-7 Stand-Up Edge Grinder as the last “metal” step before switching to resin pads for polishing concrete. At 120/140 grit, it refines the surface after coarser grinding, and its long spiral segments keep the tool flatter on the ground and reduce gouging for a cleaner, more uniform result. Size: 7″ x 7/8″.

Call for pricing and availability — you’ll talk to a real surface-prep expert, not a call center.

Key Features

• Commonly used on the TC-7 Stand-Up Edge Grinder — works with any 7″ grinder
• 7″ x 7/8″ premium spiral bi-turbo cup wheel
• 18 segments, 120/140 grit — fine metal-grinding step
• Long spiral segments — keep the tool flatter on the ground and reduce gouging
• The last metal step before resin polishing — bridges grinding to polishing

Where It Fits in the Process

This cup wheel handles the transition from metal grinding to resin polishing. After you’ve done your coarser grinding, the 120/140 grit refines the surface — then you switch to resin pads to bring up the polish. It completes the first two to three steps of the polishing process, setting up a clean surface for the finishing pads.

The long spiral segments are the key: they keep the wheel flatter against the floor, which reduces gouging and gives you a smoother, more even result — especially valuable on edge work and countertops where finish quality shows.

Perfect for the TC-7 Edge Grinder

This is the go-to cup wheel for the TC-7 Stand-Up Edge Grinder — used as the final metal grinding step before resin polishing. If you’re running a TC-7 for edge work, this wheel is a natural part of your setup.

What It’s For

• Fine metal grinding before resin polishing
• Edge work and countertops — where the flat, low-gouge finish matters
• Concrete polishing — the metal-to-resin transition step
• The final “metal” step on the TC-7 or any 7″ grinder

Frequently Asked Questions

What’s it for? The fine metal-grinding step before switching to resin pads — it completes the first two to three steps of the polishing process.

What grit? 120/140 grit.

What size? 7″ x 7/8″, with 18 segments.

What machine does it fit? Commonly used on the TC-7 Stand-Up Edge Grinder, and works with any 7″ grinder.

Why the long spiral segments? They keep the tool flatter on the ground and reduce gouging for a cleaner finish.

Order Your 7″ 18-Segment Bi-Turbo Cup Wheel Today

Call (815) 941-4800 x 1 or fill out our contact form. See our cup wheels, hand grinder accessories, and diamond tooling.

Item # 670799120 (US Saws CW7BT99120SDN)