3M
3M Cubitron II Quick Change Disc Extra Coarse 984F 2 in 36 Grit PK50
A pack of 50 orange ceramic-coated quick-change discs, 2 in diameter with 36 grit extra-coarse grade for high-speed sanding and grinding up to 25,000 RPM
- TypeSanders & Grinders Accessories
- Extra-coarse 36-grit ceramic cuts aggressive material fast
- TR roll-on/off system swaps discs in seconds
- 25,000 RPM rating handles high-speed grinders safely
- YF-weight cloth backing resists tearing under heavy pressure
- 50-disc pack keeps the workshop stocked longer
2-inch Ceramic Quick-Change Discs
The 984F series uses a TR roll-on/off attachment that fits compatible right-angle grinders and sanders. Each 2-inch disc is coated with 36-grit ceramic abrasive on a YF-weight cloth backing. The extra-coarse grade targets rapid stock removal on metal surfaces. A pack contains fifty discs for high-volume shop use.
Sustained Load Behaviour
Ceramic grain fractures continuously to expose fresh cutting edges during prolonged grinding. The cloth backing resists heat buildup better than paper equivalents at the rated 25,000 RPM maximum speed. This structure maintains a consistent cut rate through extended passes without rapid dulling. Operators can finish large weld seams or heavy corrosion areas with fewer disc changes.
TR Attachment Practical Limits
The Type 3 roll-on/off system locks the disc securely for high-speed rotation but requires a matching backup pad with the same interface. Quick-change convenience drops if the pad threads wear or if debris clogs the locking mechanism. Discs must be centred precisely during installation to avoid vibration at the upper RPM limit. The 2-inch diameter restricts the contact patch to small or contoured work areas.
Highlights
- Extra-coarse 36-grit ceramic cuts aggressive material fast
- TR roll-on/off system swaps discs in seconds
- 25,000 RPM rating handles high-speed grinders safely
- YF-weight cloth backing resists tearing under heavy pressure
- 50-disc pack keeps the workshop stocked longer
Specifications
| Brand | 3m Cubitron Ii |
|---|---|
| Type | Sanders & Grinders Accessories |
Questions about this item
How loud or hot does the 984F disc get during all-day sanding?
The 984F ceramic disc runs at up to 25,000 RPM; noise and heat depend on the tool and workpiece, so follow the sander manufacturer’s guidelines for continuous use.
What must I already own to mount these 2 in TR roll-on/off discs?
You need a compatible quick-change holder or backup pad that accepts the Type 3 TR roll-on/off attachment system.
Will the 36-grit 984F disc work on the older right-angle grinder I keep in the shop?
Yes, if the grinder accepts a 2 in Type 3 TR roll-on/off disc and is rated for at least 25,000 RPM.
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