QB300 series｜Machine Tool Products

Machine Tool

Quick jaw-change chuck
QB300 series

Suitable for multi-product variable-volume production

QB300 series

Easy set-up and quick change of top jaw

*CE correspondence

CE correspondence model is QB300N and its specifications are the same as QB300’s except for the jaw release handle.

Download Catalogue pages (PDF)

Download instruction manual (PDF)

Product Specifications

【Important】The max. draw bar pull force and the max. static gripping force in the following specifications are for external diameter gripping.
When used for internal diameter gripping, the draw bar pull force must be less than half of the max. draw bar pull force.

Model		QB306	QB308	QB310	QB312
Through-hole (mm)		45	52	75	91
Gripping Range (mm)	Max.	140	180	210	250
Gripping Range (mm)	Min.	8	15	23	32
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)		22	34	43	55
Max. Static Gripping Force (kN)		57	84	111	144
Max. Speed (min^-1)		5500	4500	4000	3000
Moment of Inertia (kg･m²)		0.058	0.173	0.318	0.745
Net Weight (kg) (with Soft Top Jaws)		12.6	23.2	35	56
Matching Cylinder		S1246	S1552	S1875	S2091
Matching Soft Jaws		Standard Extra Tall	Standard Extra Tall	Standard Extra Tall	Standard Extra Tall
Outline Drawing	PDF
	DXF
	DWG