4 mm Carbide Cutter - 5-14-345-1
- Cutter. For 4mm injury size. For tire, wheel repairs.
Low-Speed Carbide Burr 4 mm for Puncture Hole Prep
Mechanical burr for repair-hole preparation | Max. 1200 RPM | Sold as 1 pc.
Before a plug or insert goes into a tire, the puncture channel needs to be cleaned up and evened out first — that step decides whether the repair actually holds. That's what this 4 mm low-speed burr is built for. The serrated, sharp edges strip away damaged rubber from inside the channel and shape it so a plug or insert seats properly. The burr runs at up to 1200 RPM and fits a low-speed grinder, a drill chuck, or a quick-change chuck — for the quick-change option you'll need a separate quick-change burr adapter, sold on its own.
Why hole prep matters
An unprepped or unevenly cut hole tends to cause the same problem twice: the repair doesn't hold. Damaged rubber around the channel keeps tearing under load, and the plug or insert loses its seal after a short time on the road. Running the burr through the channel clears that damaged material, so the plug or insert sits tight and stays put.
Build and materials
Made from metal built for regular shop use.
Sized for typical puncture channels.
Clear material from the channel walls quickly and evenly.
Rated up to 1200 RPM.
Low-speed grinder, drill chuck, or quick-change chuck.
Specifications
| Parameter | Value |
|---|---|
| Part number | 14-345-1 |
| Product type | Low-speed mechanical burr |
| Diameter | 4 mm |
| Max. speed | Up to 1200 RPM |
| Material | Metal |
| Fits | Low-speed grinder, drill chuck, or quick-change chuck (adapter needed) |
| Sold as | 1 piece |
What it's used for
- Cleaning up damaged rubber before a tire repair
- Shaping and clearing the puncture channel before a plug or insert goes in
- Running on low-speed grinders sold in our shop
- Mounting in a drill chuck or quick-change chuck (with the right adapter)
- Daily use in tire repair shops
Frequently asked questions
Why bother prepping the hole before repairing it?
A rough or uneven hole raises the odds the repair fails in the same spot within days. The burr clears rubber debris from the channel, so the plug or insert grips harder and lasts longer.
What speed is safe for this burr?
Up to 1200 RPM. Check your drive tool before you start — running it faster shortens the burr's life.
What can I mount the 14-345-1 burr in?
A low-speed grinder, a drill chuck, or a quick-change chuck. For the quick-change chuck you'll need a separate quick-change burr adapter.
Does the quick-change adapter come with it?
No — the adapter is sold separately, and only needed if you're mounting the burr in a quick-change chuck.