Thread cutting & thread repair
Baer Thread Tools Cut It. Repair It.
Over 1,900 Baer lines in UK stock: BaerCoil wire thread inserts and STI taps for thread repair, HSS circular dies, die nuts and diestocks for external threads, and machine taps, tap wrenches, countersinks and drill sets for the bench.
The Baer range
Shop Baer by Job
Three jobs, one brand: repair a damaged internal thread, cut or clean up an external thread, and prepare and tap the hole by hand or on the machine.
597BaerCoil Thread Inserts
Restore a stripped or worn internal thread to its original size. Metric, UNC, UNF, BSW, BSF, BSP and BA.
Shop thread inserts
169STI Taps for Thread Inserts
Cut the oversize thread a wire insert screws into. Bottoming taps for blind holes, spiral point for through holes.
Shop STI taps
787Circular Dies
Cut external threads by hand in a diestock. Versions for general use, higher demands, stainless steel and brass.
Shop circular dies
258Hexagon Die Nuts
Re-cut and clean up damaged external threads where a diestock will not fit.
Shop die nuts
39Diestocks
The handle that holds a circular die, sized to the die diameter and thickness.
Shop diestocks
38HSS-E Machine Taps
Machine taps for blind and through holes in 100, 120 and 150 mm overall lengths.
Shop machine taps
22Tap Wrenches & Holders
Adjustable tap wrenches in premium zinc die-cast and steel, plus short and long ratchet tap holders.
Shop tap wrenches
12Drill & Tap Sets
Drill sets for general use and all materials, and M3 to M12 drill and tap sets.
Shop drill sets
16Countersinks
Single 90° countersinks for general use and stainless steel.
Shop countersinksFind your thread
Shop Baer by Thread Form
Every Baer range by thread form. RH right hand, LH left hand, HD for higher demands, SS for stainless steel. BaerCoil inserts and STI taps in the Metric coarse row cover fine pitches too.
| Thread form | BaerCoil inserts | STI taps | Circular dies | Die nuts |
|---|---|---|---|---|
| Metric coarse | Shop | BottomingSpiral point | RHLHHDSSBrass | RHLH |
| Metric fine | In Metric coarse row | In Metric coarse row | RHLHHDSS | RH |
| UNC | Shop | Bottoming | RHLHSS | – |
| UNF | Shop | Bottoming | RHLHSS | RH |
| UNEF, 8-UN, 12-UN | – | – | UNEF8-UN12-UN | – |
| BSW (Whitworth) | Shop | Bottoming | BSW RHWhitworth RH | RH |
| BSF | Shop | Bottoming | RH | RH |
| BSP (G) | Shop | Bottoming | RHLHSS | – |
| BSPT (R) | – | – | – | RH |
| BA | Shop | Bottoming | RH | – |
| BS Brass | – | Bottoming | – | – |
| NPT, NPSM | – | – | NPT RHNPSM RH | NPT RH |
| Trapez (TR) | – | – | RHLH | – |
| PG, FG, BSC, RD, VG, Camera | – | – | PGFGBSCRDVGCamera | – |
Thread repair
How a BaerCoil Repair Works
A stripped thread in an expensive part does not have to mean scrapping it.
- 1
Drill Out
Drill the damaged thread out to the STI tap drill size for the thread you are repairing.
- 2
Tap
Cut the oversize thread with a Baer STI tap: bottoming for blind holes, spiral point for through holes.
- 3
Fit the Insert
Wind the BaerCoil insert in with an installation tool until it sits just below the surface.
- 4
Done
The hole takes a standard bolt again, at its original size and pitch.
Questions
Baer Tools: Common Questions
What is an STI tap?
STI stands for screw thread insert. An STI tap cuts a thread larger than the nominal size, so a wire thread insert can be fitted and bring the hole back to the original thread. An M8 x 1.25 insert needs an M8 x 1.25 STI tap, not a standard M8 tap.
What lengths do BaerCoil inserts come in?
BaerCoil inserts are sold by nominal length as a multiple of the thread diameter: 1 x D, 1.5 x D, 2 x D, 2.5 x D and 3 x D, depending on the size. A longer insert spreads the load over more thread, which matters in soft materials such as aluminium.
What is the difference between a circular die and a hexagon die nut?
A circular die sits in a diestock and cuts a new external thread. A hexagon die nut is turned with a spanner and is mainly used to re-cut or clean up a damaged thread, especially where there is no room to swing a diestock.
Which diestock fits my die?
Diestocks are sized by the outside diameter and thickness of the die, for example 20.6 x 6.35 mm. Check the die dimensions on its product page and choose the diestock with the same size.
Which Baer circular die should I choose for my material?
Baer makes circular dies for general use, for higher demands, for stainless steels and, in metric coarse, for brass. The material version is in the product title, and the thread form table above links each one.
Not Sure Which Baer Tool You Need?
Tell us the thread and the material and we will pick the insert, tap or die. Everything here ships from Kent.
