Type：

1，Interlocking kelly bar.

2，Friction kelly bar.

3，Full locking kelly bar.

4，Combined kelly bar.

Factory View：

Advantages：

1，Top quality of steel tube, welding wire, drive key and kelly stub etc. ST52, 35Crmo, Hardox500, forged technology are making reliable Kelly bar.

2，Special heat treatment, robot welding machine, leveling adjustment platform are making high strength Kelly bar.

3，Rich experiences, perfect design and customized services will making the suitable kelly bar for you.

4，Online and site Services.

Features：

1，Kelly box 130mm/150mm/200mm/250mm customized.

2，Cutting ring with staggered arrangement of roller bits.

3，Easy replacement of roller bits.

4，Around wearing strips.

Production Process：

Parameters：

We made many friction kelly bars for Soilmec, Mait, Casagrande, Sany, XCMG, Zoomlion etc.

OD（mm）	Elements	LockingType	Section Length	Drill Depth	Torque
325	3/4	Friction	7-15	18-50	100-120
355	3/4	Friction	10-15	24-50	100-120
368	3/4	Friction	10-15	24-52	150-180
377	3/4	Friction	10-15	24-52	150-180
394	3/4/5	Friction	10-17	24-68	180-200
406	3/4/5	Friction	10-17	24-78	180-200
419	3/4/5	Friction	10-20	24-78	200-230
440/445	3/4/5	Friction	10-20	24-93	220-260
470/482	3/4/5	Friction	10-20	24-93	220-260
508	3/4/5/6	Friction	10-22	32-116	260-360
530	3/4/5/6	Friction	10-22	32-122	320-400
559	3/4/5/6	Friction	10-25	32-140	320-400
580	3/4/5/6	Friction	10-25	32-140	360-420
630	3/4/5/6	Friction	10-25	32-140	400-500
Other sizes can be customized

Kelly bar details: