Royal “Oil Country” Big-Bore Bull Head Live Centers

Designed specifically for machining large diameter pipes for the oil and gas industry, but suitable for all large-bore applications.
In contrast to standard bull head live centers, the modular head design of Royal “Oil Country” Big-Bore centers positions the workpiece closer to the bearing assembly for greater rigidity and longer operating life.
Interchangeable heads are relieved to achieve the optimal strength/mass ratio, and are sized to cover a wider range of bore sizes with fewer models.
Bearing configuration consisting of a heavy-duty tapered roller bearing, a large axial thrust bearing, and two precision needle bearings provides exceptional accuracy and rigidity under the most demanding production conditions.

5 MT Specifications

TAPER	PART NUMBER	B	G	J	SUGGESTED RPM*	WORKPIECE (LBS.)	LOAD (LBS.)
5 MT	10791	4.62	1.63	5.31	2,050	4,500	2,650
5 MT	10792	7.37	4.38	4.59	1,300	4,500	2,650
5 MT	10793	10.12	7.13	4.59	950	4,500	2,650
5 MT	10794	12.87	9.88	4.59	750	4,500	2,650
5 MT	10795	15.62	12.63	4.59	600	4,500	2,650

TAPER	PART NUMBER	B	G	J	SUGGESTED RPM*	WORKPIECE (LBS.)	LOAD (LBS.)
6 MT	10791	4.62	1.63	6.57	2,050	11,000	3,500
6 MT	10792	7.37	4.38	5.85	1,300	11,000	3,500
6 MT	10793	10.12	7.13	5.85	950	11,000	3,500
6 MT	10794	12.87	9.88	5.85	750	11,000	3,500
6 MT	10795	15.62	12.63	5.85	600	11,000	3,500

Taper	PART NUMBER	PRICE
5 MT	10782	$1,764
6 MT	10784	$2,590

Head not included. Order separately.

Head Model	B	G	Head Weight (LBS.)	PART NUMBER	PRICE
A	4.62	1.63	7	10791	$852
B	7.37	4.38	18	10792	$1,317
C	10.12	7.13	33	10793	$2,044
D	12.87	9.88	51	10794	$2,922
E	15.62	12.63	65	10795	$5,093