BRT series｜Machine Tool Products

Machine Tool

2-jaw High Precision, Ultra-large Through-hole, High-speed Power Chuck
BRT series

Higher precision 2-jaw gripping

BRT series

Gripping accuracy of 0.01 mm T.I.R. or less^{Note 4}
Reduced jaw-lift
Interchangeable with Kitagawa BT200 and BBT200 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}
With optional BR-AJC-M, which upgrades the BR chuck to quick jaw change chuck, the setup time will be further reduced. The repeatability is also less than 0.01mm T.I.R. ^{Note 4}
Please click here for details.

*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 BRT12 are 0.015 mm T.I.R.

Note 5) Download the instruction manual for the optional Tnut-Plus here.

PAT 6345321

PAT 6345375

PAT 6411619

Download instruction manual (PDF)

Product Specifications

Model			BRT06	BRT08	BRT10	BRT12
Through-hole (mm)			53	66	81	106
Gripping Range (mm)		Max.	170	210	254	315
Gripping Range (mm)		Min.	20	28	38	54
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)		at OD Gripping	15.3	23.3	32.7	40
Max. Draw Bar Pull Force (kN)		at ID Gripping	7.7	11.7	16.4	20
Max. Static Gripping Force (kN)		at OD Gripping	39	60	82	104
Max. Static Gripping Force (kN)		at ID Gripping	19.5	30	41	52
Max. Speed (min^-1)			6000	5000	4500	3500
Dynamic Gripping Force at Max. Speed (kN) (at OD Gripping)			16	29	29.4	44.2
Moment of Inertia (kg･m²)			0.05	0.13	0.32	0.78
Net Weight (kg) (with Soft Top Jaws)			12.5	21.7	34.9	56.2
Matching Cylinder			SR1453C SS1453K	SR1566C SS1666K	SR1781C SS1881K	SS2110K
Matching Soft Jaws Note) Jaw-mounting bolts are not included.			Standard Extra Tall Small diameter gripping	Standard Extra Tall Small diameter gripping	Standard Extra Tall Small diameter gripping	Standard Extra Tall Small diameter gripping
Tnut-Plus (Option)			TN06PLUS	TN08PLUS	TN10PLUS	TN12PLUS
Outline Drawing	2D	PDF
		DXF
		DWG
	3D	Parasolid
		STEP
		Parasolid
		STEP

Note) The blue 3D data represents the jaw positions at the fully open (UC) and fully closed (OC) ends for both Parasolid and STEP.

The pink 3D data represents the jaw positions at the centre of stroke (HCL), the appropriate open end (HOL) and the appropriate closed end (HUL) for both Parasolid and STEP.

Jaw stroke