BR Series Power Chucks with Gripping Accuracy of Up to 0.01mm T.I.R After Jaw Forming

Kitagawa Power Chucks have been selected by the world’s leading machine tool OEMs for over 50 years. After many years of research and development, Kitagawa introduces their Next Generation design, the new BR Series of Power Chucks. The new flagship line of Power Chucks are designed to achieve the level of industry acceptance of its famed predecessor the B200 and BB200 Series (Big Bore), as it now takes gripping accuracy to a new level unprecedented in the metalworking/machining industry.

The industry standard for repeatability (clamping a workpiece, zero out indicator, unclamp and re-clamp the same workpiece) with a set of formed jaws (where the jaws are turned to match the diameter of the workpiece) was 20 microns. The BR Power Chuck Series has increased this accuracy to below 10 microns. This degree of high accuracy machining can be accomplished now with the BR Series as a standard specification.

Kitagawa High Precision, Ultra-large Through-Hole, BR Series Power Chucks

The standard has evolved.

Gripping accuracy of 0.01 mm T.I.R. or less^{Note 4}
Reduced jaw-lift
Interchangeable with Kitagawa B-200 and BB200 series
With Tnut-Plus optional dedicated T-nuts, the repeatability of jaws at detaching and attaching is 0.01 mm T.I.R. or less^{Note 4}

*CE correspondence

Note 1) The gripping accuracy is the Total Indicator Reading of a test bar right after forming jaws to grip a test bar.

Note 2) The repeatability is the Total Indicator Reading of a test bar measured by detaching the formed jaws from the chuck and mounting them again in the same position.

Note 3) Both gripping accuracy and repeatability are the T.I.R. of a test bar at 10 mm above from Kitagawa standard soft jaw.

All the above criteria are based on our internal regulations.

Note 4) Both accuracies for only BR12 are 0.015 mm T.I.R.

PAT 6345375

PAT 6345321

Product Specifications

Model			BR06	BR08	BR10	BR12
Through-hole (mm)			53	66	81	106
Gripping Range (mm)		Max.	170	210	254	315
Gripping Range (mm)		Min.	16	22	31	49
Jaw Stroke (Diameter) (mm)			5.5	7.4	8.8	10.6
Plunger Stroke (mm)			12	16	19	23
Max. Draw Bar Pull Force (kN)			23	35	49	59
Max. Static Gripping Force (kN)			58.5	90	123	153
Max. Speed (min^-1)			6000	5000	4500	3500
Dynamic Gripping Force at Max. Speed (kN)			22.5	36	44	50
Moment of Inertia (kg･m²)			0.052	0.14	0.32	0.81
Net Weight (kg) (with Soft Top Jaws)			12.8	22.2	35.8	58.3
Matching Cylinder			SR1453 SS1453K	SR1566 SS1666K	SR1781 SS1881K	SR2010 SS2110K
Outline Drawing	2D	PDF
		DXF
		DWG
	3D	Parasolid
	3D	STEP