KC Chain Couplings

Chain Couplings

Last updated 2026-09-12 Reviewed by Luo Genwen, Production Plant Manager

Coupling Selector · Specifications

KC Chain Couplings selector

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KC chain coupling dimensional drawing — KC chain coupling · Engineering drawing · PDF page 1

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Data table

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Complete size table · 32 sizes (static version for printing and full-text search)

KC chain coupling · KC dimensions
Model	Chain pitch mm	Process bore mm	Minimum bore mm	Maximum bore mm	O O · mm	L L · mm	DH DH · mm	LH LH · mm	S S · mm	C C · mm	cover_A cover_A · mm	cover_B cover_B · mm
KC-3012	9.525	12	13.5	16	45	65	27.2	29.5	6	10.1	69	63
KC-4012	12.7	12	14	22	62	79.4	36	36	7.4	14.4	77	72
KC-4014	12.7	12	14	28	69	79.4	45	36	7.4	14.4	84	75
KC-4016	12.7	13.5	16	32	77	87.4	51.5	40	7.4	14.4	92	72
KC-5014	15.875	14.5	17	35	86	99.7	56	45	9.7	18.1	101	85
KC-5016	15.875	14.5	18	40	96	99.7	64	45	9.7	18.1	110	87
KC-5018	15.875	16	18	45	106	99.7	73.5	45	9.7	18.1	122	85
KC-6018	19.05	20	22	56	127	123.5	89.5	56	11.5	22.8	147	105
KC-6020	19.05	20	24	60	139	123.5	102.5	56	11.5	22.8	158	105
KC-6022	19.05	20	28	71	151	123.5	115	56	11.5	22.8	168	117
KC-8018	25.4	20	32	80	169	141.2	115	63	15.2	29.3	190	129
KC-8020	25.4	20	36	90	185	145.2	125	65	15.2	29.3	210	137
KC-8022	25.4	20	40	100	202	157.2	142	71	15.2	29.3	226	137
KC-10020	31.75	25	45	110	233	178.8	162	80	18.8	35.9	281	153
KC-12018	38.1	35	50	125	256	202.7	173	90	22.7	45.4	307	181
KC-12022	38.1	35	56	145	304	222.7	213	100	22.7	45.4	357	181

KC chain coupling · KC performance and mass
Model	Nominal torque N·m	Coupling body mass kg	Cover mass kg
KC-3012	40	0.33	0.22
KC-4012	63	0.73	0.3
KC-4014	100	1.12	0.31
KC-4016	160	1.5	0.35
KC-5014	200	2.15	0.47
KC-5016	250	2.75	0.5
KC-5018	320	3.6	0.6
KC-6018	630	6.55	1.2
KC-6020	700	8.38	1.2
KC-6022	1000	10.4	1.2
KC-8018	1200	13.2	1.9
KC-8020	1600	16.2	2.5
KC-8022	2100	21.8	2.7
KC-10020	2500	32.4	4.1
KC-12018	3100	43.2	5.2
KC-12022	4300	69.1	6.7

Static copy of the selector data for reference and printing; use the interactive selector above to filter, sort and request a quote. All dimensions in mm; full range and tolerances per the PDF catalogue.

Dimensions and performance are shown separately. Sort by any column; consult the PDF catalogue for the full range, tolerances, and operating conditions. Download PDF catalogue ↗

FAQ

Common questions about this series

Chain Couplings: what size range does the table cover?

This page covers 1 series (KC) with 16 catalogue sizes: bores from Ø12 to Ø145 mm, rated torque 40–4300 N·m. Finished bores, keyways and clamp variants are machined to your shaft; sizes outside the tables are made to drawing.

Chain Couplings: what is it and when should I use it?

KC series chain couplings: a 40Mn duplex chain wraps two C45 sprockets, teeth induction hardened, aluminum-alloy cover. Simple, easy to fit and remove, high capacity — for hot, damp and dusty duty, motors up to 185 kW. Chain couplings are the simple, rugged choice for hot, damp or dusty duty on motors up to about 185 kW: a duplex roller chain wraps two hardened sprockets, so the coupling is easy to fit and strip in place and carries high load for its size. Use the aluminium cover to keep grease in and dirt out.

Chain Couplings: can I order a size that is not in the table, or just one piece?

Yes. Everything on this page is made to drawing, and the table is only the standard-size subset of the catalogue. Minimum order quantity is one piece — we routinely make single replacement parts for OEMs whose original supplier has discontinued the item. Send a DWG, STEP or PDF drawing (or a sample part): you get a formal quotation within 24 hours after the information is complete, and the first article ships within 30 days of drawing approval, with inspection records.

Chain Couplings: what do I need to send to get a quote?

Send: shaft diameters and lengths on both sides (with keyways or clamp preference), rated and peak torque, speed, the misalignment you expect (angular, radial, axial), space available (outside diameter and overall length), operating temperature and whether the drive is servo/positioning or general. A drawing or STEP of the two shaft ends is ideal; a sketch with these values is enough for a first quote.

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