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K12 series four jaw self centering chuck

K12 Series Four Jaw Self Centering Chuck

Material: High-strength alloy cast iron, hardened jaws HRC≥45
Centering accuracy: ≤0.02 mm
Reversible jaws: Built-in inner & outer clamping jaws
Sizes available: 80/100/125/160/200/250mm
Standard: ISO3442

Order No	D1	D2	D3	H	H1	h	2-d	KG
80	55	50	16	66	50	3.5	4-M6	2
100	72	53.5	22	73	53.5	3.5	3-M8	3
125	95	58	30	84	58	4	3-M8	5
130	100	60	30	86	60	3.5	3-M8	5.6
160	130	65	40	95	65	5	3-M8	88
160A	130	65	40	109	65	5	3-M8	8.3
165	130	66.5	40	96.5	66.5	4.5	3-M8	9.8
190	155	75	55	105	75	5	3-M10	13.8
200	165	75	65	109	75	5	3-M10	15.5
200C	165	75	65	122	75	5	3-M10	14.1
200A	165	75	65	122	75	5	3-M10	141
240	195	80	70	120	80	8	3-M12	25
250	206	80	80	120	80	5	3-M12	26
250C	206	80	80	130	80	5	3-M12	23
250A	206	80	80	136	80	5	3-M12	23
325(325)C	272	96	100	153.5(154.5)	96	12	3-M16	50(45)
325A	272	96	100	169.5	96	12	3-M16	47
380(380C) C	325	98	135	155.5(156.5)	98	6	3-M16	66(61)
380A	325	98	135	171.5	98	6	3-M16	63
500A	440	115	210	202	115	6	4-M16	119

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4 jaws move synchronously for automatic centering
Stable clamping force, low workpiece runout
Quick clamping without repeated adjustment
Fit for manual lathe & small CNC lathe

3. Application Scenarios

Lathe machining of square, rectangular & octagonal workpieces
Clamp round shaft & disc parts for turning, boring, grinding
Batch precision machining in mold, auto, hardware workshops
Small CNC lathe, bench lathe & instrument lathe fixture

FAQ:

Q1: What is a 4-jaw independent chuck?

A 4-jaw independent chuck is a lathe workholding device with four separately adjustable jaws. Each jaw is adjusted independently for precise clamping, offering strong grip and high accuracy for irregular and heavy-duty workpieces.

Q2: What is the difference between a 4-jaw independent chuck and a 4-jaw self-centering chuck?

A 4-jaw self-centering chuck works synchronously for fast mass production of regular parts. A 4-jaw independent chuck features separate jaw movement, supporting manual precision centering and eccentric clamping with higher rigidity, ideal for irregular workpieces and high-precision single-piece machining.

Q3: What are the core advantages of your 4-jaw independent chucks?

Key advantages: multi-scene compatibility for round, square, irregular and eccentric parts; high precision up to 0.002mm after calibration; heavy-duty steel construction for stable clamping; wear-resistant structure for long service life and consistent performance.

Q4: What workpieces are 4-jaw independent chucks suitable for?

Suitable for irregular castings, forgings, square bars, oval and eccentric workpieces. Widely used in mold making, aerospace, machinery and hydraulic parts for small-batch, high-precision turning.

Q5: When should I choose a 4-jaw independent chuck instead of a 3-jaw chuck?

Choose 4-jaw independent chucks if you need to clamp irregular/eccentric parts, require ultra-high centering accuracy, or perform heavy-duty cutting that needs firm, uniform clamping force.

Q6: What sizes do your 4-jaw independent chucks support?

Available in sizes 80mm–1250mm. Custom clamping range, mounting holes and reversible jaws are supported. Fits most standard lathes and CNC lathes.

16: Can you provide customized 4-jaw chuck services?

We provide custom jaws, mounting flanges, special clamping sizes and precision upgrades to meet custom workpiece processing needs.

Q17: What is your product warranty and after-sales service?

We offer 12-month warranty, 24-hour online technical support, free accessory replacement for non-human damage, and OEM/ODM service.

Q18: What is your product packaging and delivery mode?

Shockproof and anti-rust wooden/carton packaging. We support global sea, air and express delivery with flexible bulk order logistics solutions.

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