Zhejiang Yuanpai Machine Tool Accessory Plant-- the biggest private owned lathe chuck manufacturing

For the convenience of users. the main products and their general technical features shown below .

We mainly produce full range of manual operating self-centring chucks and 4 jaw independent chuck for lathe machine use.(Ref.Index1)

The self-centering chuck's mounting type including cylindrical center mounting and short taper mounting .

The chucks with cylindrical mounting normally be installed onto the spindle nose by a adapter plate.

Chucks with taper mounting can be installed onto the lathe machine directly. Rod short taper spindle noses. there are A1,A2,C&D types. In the case of A type mount, Except a small quantity lathes due to the structure limit, most of lathe machines use A1 type tape lapper mount which using tapped holes in inner bolt circles. But the A2 type do achieve high performance due to using outer tapped holes in outer bolt circles. C type mount use screw bolt nut and belong to quick change series chucks, which can be installed and removed quickly, D type mount use draw bar structure, tightened by cam lock at the spindle noses, it also belong to the quick change chucks.

For short taper chuck, body and cover are connected with screws, forming sealed ridged structure improving mounting accuracy, and connecting rigidity.

Now short taper chucks have been used wide in foreign countries, so it is a important and necessary machine parts for lathe machine .More and more Chinese users start to use it now. The price difference is approx 25%.and the atria; difference is only less than 10% if reducing the cost of making adapter plate. The cutting feature of machine tools may be improved obviously, by using the short taper chucks.

The jaws are classified as solid (or one-piece ) jaws and separate (or two-piece) jaws, two types .The separate type jaw include base jaw, hard or soft top jaw connected by screw nut. It can be adjusted into intremal and extemal jaws use Separate Jas include A and C type jaws . A type jaw designed accord with ISO3442 which is inter changeable for connecting dimensions in the world. C type is a Chinese traditional jaws specially designed.

For example

K72 series independent chucks include taper mount & cylindrical mount, two types . A2 mort type is widely used due to high connecting rigidity .

Product	Feature	Application
K10 Series two-jaw self-centering chuck	Suitable for processing Various irregular shape Work pieces	General Lathe, Economic numerical-controlled lathe, Milling & Drilling chine, Dividing head and rotary table etc.
K11 series three- jaw self-centering chuck	Suitable for processing rod, plate shape work pieces	Genera lathe, Economic NC lathe, Milling & Drilling Machine, Dividing head and rotary table etc.
K12 four self-centering chucks	Suitable for processing square and eight- edged working pieces and also for rod, plate shape workplaces	Genera lathe, Economic NC lathe, Milling & Drilling Machine, Dividing head and rotary table etc.
K72 four jaw independent chuck	Jaws individually adjustable to meet concentricity, suitable for irregular and eccentric Work pieces processing	Genera lathe, Economic NC lathe, Milling & Drilling Machine, Dividing head and rotary table etc.

Three-Jaw Self-Centring Chucks Clamping Range.

Chuck Dia Ø	Internal Jaws		External Jaws
	Clamping range	Jamming range	Clamping range
	A~A	B~B	C~C1
80	2~22	25~70	22~63
100	2~30	30~90	30~80
125	2.5~40	38~125	38~110
130	3~40	40~130	40~120
160	3~55	50~160	55~145
165	4~60	52~165	55~150
190	4~70	65~190	65~190
200	4~85	65~200	65~200
240	6~100	80~250	90~250
250	6~110	80~250	90~250
315	10~140	95~315	100~315
320	11.5~145	95~320	110~320
325	11.5~165	95~350	110~340
380	11.5~210	95~400	110~400
400	16~210	120~400	120~400
500	25~280	150~500	150~500
630	50~350	170~630	170~630
800	100~500	200~800	200~800

Four-Jaw Independent Chucks Clamping Range.

Model D Size	Internal Jaws clamping range	External jaws clamping range
Model D Size	A-A1	B-B1
80	5-35	35-80
100	6-45	40-100
125	7-57	48-125
160	8-80	50-160
200	10-100	63-200
250	15-130	80-250
300	20-156	100-300
315	20-170	100-315
320	20-176	100-320
350	20-206	100-350
400	25-250	118-400
450	30-280	120-450
500	35-300	125-500
630	50-400	160-630
800	70-540	200-800
1000	100-680	250-1000