CROCNC Precision Couplings — Shenzhen Crocnc Equipment Co., LTD

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Coupling Series & Specifications

Diaphragm · Plum/Jaw · Cross Slider · Beam · Encoder — 30+ models

Diaphragm Plum / Jaw Cross Slider Beam Encoder 45# Steel Stepped Diaphragm

CRO-CS

Aluminum Single Diaphragm Clamp-Type Coupling

Outer Dia. (ΦD)

19 – 126 mm

Bore Range

3 – 78 mm

Rated Torque

1 – 350 N·m

Max Speed

7,500 – 50,000 rpm

Model	Bore d1,d2 (mm)	ΦD	L	Rated Torque (N·m)	Ang. (°)	Par. (mm)	Max Speed (rpm)	Torsional Stiffness (N·m/rad)	Weight (g)
CS-19+20	3–8	19	20	1	1	≤0.09	50,000	1,400	11
CS-26+26	3–12	26	26	1.5	1	≤0.14	10,000	3,700	28
CS-32+28	5–15	32	28	2	1	≤0.18	10,000	5,700	46
CS-34+32	5–16	34	32	3	1	≤0.18	10,000	8,100	55
CS-39+34.5	8–19	39	34.5	6	0.1	≤0.23	10,000	18,000	81
CS-44+34.5	8–24	44	34.5	9	0.1	≤0.27	10,000	20,000	99
CS-50+41	8–24	50	41	18	0.1	≤0.30	10,000	32,000	135
CS-56+45	10–32	56	45	25	0.1	≤0.36	10,000	50,000	217
CS-64+53	12–38	64	53	60	0.1	≤0.4	9,000	70,000	348
CS-82+68	17–42	82	68	80	0.1	≤0.5	8,000	140,000	689
CS-94+68	19–45	94	68	165	0.1	≤0.7	8,000	120,000	960
CS-104+70	20–48	104	70	235	0.1	≤0.8	8,000	120,000	1,200
CS-126+78	20–55	126	78	350	0.1	≤0.9	7,500	135,000	1,560

Model naming: CS-d1+d2 — d1 = input bore (mm), d2 = output bore (mm). Keyway and non-standard bores available on request.

CRO-CD

Aluminum Single Diaphragm Clamp (Extended Length)

Outer Dia. (ΦD)

19 – 126 mm

Bore Range

3 – 78 mm

Rated Torque

1 – 350 N·m

Max Speed

8,000 – 50,000 rpm

Model	Bore d1,d2 (mm)	ΦD	L	Rated Torque (N·m)	Ang. (°)	Par. (mm)	Max Speed (rpm)	Torsional Stiffness (N·m/rad)	Weight (g)
CD-19+27	3–8	19	27	1	0.12	≤0.18	50,000	700	14.6
CD-26+35	5–12	26	35	1.5	0.15	≤0.18	10,000	1,850	37
CD-28+32.2	5–14	28	32.2	1.5	0.15	≤0.18	8,000	2,500	45
CD-32+41	5–14	32	41	2	0.17	≤0.18	10,000	2,850	67
CD-34+45	5–15	34	45	3	0.17	≤0.18	10,000	4,050	77
CD-39+50	8–19	39	50	6	0.22	≤0.36	10,000	9,000	118
CD-44+50	8–24	44	50	9	0.22	≤0.36	10,000	10,000	144
CD-50+57	8–24	50	57	18	0.23	≤0.54	10,000	16,000	235
CD-56+64	10–32	56	64	25	0.27	≤0.72	10,000	25,000	318
CD-68+75	12–38	68	75	60	0.31	≤0.8	9,000	35,000	492
CD-82+98	17–42	82	98	80	0.55	≤0.8	8,000	70,000	1,013
CD-94+98	19–45	94	98	165	0.55	≤1.3	8,000	50,000	1,502
CD-104+102	20–48	104	102	235	0.55	≤1.3	8,000	60,000	1,650
CD-126+110	20–55	126	110	350	0.60	≤1.3	8,000	67,500	1,980

Model naming: CD-d1+d2. Select CD when the CS standard length is insufficient or higher torque margin is required.

CRO-CFC

Aluminum Plum (Jaw) Coupling, Clamp Type

Outer Dia. (ΦD)

14 – 120 mm

Bore Range

3 – 78 mm

Rated Torque

0.2 – 520 N·m

Max Speed

3,000 – 46,000 rpm

Model	Bore d1,d2 (mm)	ΦD	L	Rated Torque (N·m)	Ang. (°)	Par. (mm)	Max Speed (rpm)	Torsional Stiffness (N·m/rad)	Weight (g)
CFC-14+22	3–6.35	14	22	0.2	1	≤0.6	46,000	20	10
CFC-20+25	3–10	20	25	0.2	1	≤0.6	15,000	46	15
CFC-20+30	3–10	20	30	0.2	1	≤0.6	15,000	46	19
CFC-25+30	4–12	25	30	0.6	1	≤0.6	16,000	65	33
CFC-25+34	4–12	25	34	0.6	1	≤0.6	16,000	65	42
CFC-30+35	4–12	30	35	1	1	≤0.6	15,000	72	50
CFC-40+40	5–16	40	40	6.5	1	≤0.6	12,000	72	60
CFC-40+50	5–19	40	50	32	0.02	≤0.8	10,000	450	127
CFC-40+55	6–24	40	55	32	0.02	≤0.8	10,000	450	154
CFC-55+49	10–32	55	49	46	0.02	≤0.8	8,000	1,200	241
CFC-55+78	8–32	55	78	46	0.02	≤0.8	8,000	1,200	341
CFC-80+114	14–40	80	114	109	0.02	≤1.0	6,000	2,800	433
CFC-95+90	15–45	95	90	109	0.02	≤1.0	6,000	2,800	583
CFC-105+140	22–65	105	140	420	0.02	≤1.0	3,800	3,400	1,650
CFC-120+160	22–65	120	160	520	0.02	≤1.0	3,000	4,600	3,230

Model naming: CFC-d1+d2. TPU spider is replaceable.

CRO-FZG

Stainless Steel Plum (Jaw) Coupling, Sleeve Type

Outer Dia. (ΦD)

30 – 120 mm

Bore Range

9.5 – 65 mm

Rated Torque

14.8 – 1,040 N·m

Max Speed

2,800 – 20,000 rpm

Model	Bore d1,d2 (mm)	ΦD	L	Rated Torque (N·m)	Ang. (°)	Par. (mm)	Max Speed (rpm)	Torsional Stiffness (N·m/rad)	Weight (g)
FZG-30+50	9.9–14	30	50	14.8	0.8	≤0.6	20,000	510	115
FZG-35+55	9.9–16	35	55	16	0.8	≤0.6	18,000	510	185
FZG-40+55	10–19	40	55	19	0.8	≤0.8	18,000	520	250
FZG-40+66	10–22	40	66	19	0.8	≤0.8	18,000	550	280
FZG-55+78	12–22	55	78	68	0.8	≤0.8	13,000	1,510	700
FZG-65+90	14–28	65	90	190	0.8	≤0.8	10,500	2,800	1,100
FZG-80+114	19–45	80	114	270	0.8	≤0.8	8,600	3,600	1,850
FZG-95+126	20–50	95	126	440	0.8	≤1.0	7,200	4,700	5,680
FZG-105+140	22–50	105	140	720	0.8	≤1.0	5,800	5,800	7,730
FZG-120+160	24–65	120	160	1,040	0.8	≤1.0	7,200	7,200	9,300

Model naming: FZG-d1+d2. 304 stainless steel body — ideal for sanitary, corrosive and humid environments.

45# Steel Stepped Type

Single & Double Diaphragm Couplings (Black Oxide)

Black-oxide 45# carbon steel hubs with stepped diaphragm design for heavy-duty power transmission. High torsional strength and durability for large servo and spindle drive applications.

Outer Dia. (ΦD)

56 – 190 mm

Body Length

45 – 260 mm

Types

Single & Double Diaphragm

Material

45# Steel + Black Oxide

Type	Model (OD × L)
Single Diaphragm	OD56 – L45
	OD68 – L56
	OD82 – L68
	OD94 – L68
	OD104 – L80
	OD115 – L91
	OD126 – L93
	OD144 – L103
	OD152 – L104
	OD178 – L124
	OD190 – L145
Double Diaphragm	OD56 – L64
	OD68 – L74
	OD82 – L98
	OD94 – L98
	OD104 – L102
	OD115 – L110
	OD126 – L115
	OD144 – L166
	OD152 – L184
	OD178 – L218
	OD190 – L260

Data source: CROCNC internal quotation sheet. Custom bore diameters and keyways available on request.

More series available: CRO-HC cross slider · CRO-IC beam · CRO-B encoder · CRO-SE/LF/CW high-sensitivity diaphragm · CRO-NB/MB 8-screw high-rigidity. Download full catalog (PDF) →

Precision Couplings for Servo & Motion Control

CRO-CFC Plum (Jaw) Series

CRO-CS Single Diaphragm Series

45# Steel High-Torque Series

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