Name: Aluminum Jaw Coupling (Clamp Type)
Brand: SAILINK
Availability: InStock

What it is

The CRO-CFC is a jaw (also called plum or spider) coupling built from a one-piece aluminum hub and a TPU polyurethane elastomer spider. The spider sits between the two jaw halves, damping vibration and shock while transmitting torque with zero backlash.

Unlike our metal-diaphragm couplings, the CRO-CFC has a sacrificial elastomer element. That makes it the practical choice when you want to protect your servo motor from shock loads, or when you need a coupling that can be reconditioned simply by swapping out the spider.

Why engineers choose it

Vibration damping — the TPU spider absorbs shock and vibration, protecting the motor bearings.
Replaceable spider — when the elastomer wears, you swap the spider, not the whole coupling.
Zero backlash — the spider transmits torque with no clearance for accurate positioning.
Compact and low-inertia — the aluminum body keeps rotating mass low.
Wide torque range — from 0.2 N·m to 520 N·m across 15 sizes.

Key specifications

Outer diameter (ΦD)

14 – 120 mm

Bore range

3 – 78 mm

Rated torque

0.2 – 520 N·m

Max speed

3,000 – 46,000 rpm

Full range

Model	Bore d1,d2 (mm)	ΦD	L	Rated torque (N·m)	Angular (°)	Parallel (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 — d1 = input bore (mm), d2 = output bore (mm). The TPU spider is replaceable.

Where it's used

Stepper and servo drives on light automation
Packaging, labeling and printing machines
Conveyors and material-handling systems
Pumps and small compressors
Laboratory and medical equipment

How to choose the right coupling

Pick the CRO-CFC when vibration damping and shock protection matter more than absolute stiffness, or when you want the convenience of a replaceable spider. If your application needs maximum rigidity and no elastomer to wear, choose a metal diaphragm coupling instead. For corrosive or washdown environments, use the CRO-FZG stainless jaw coupling.

Frequently asked questions

How do I know when to replace the spider?

Inspect the spider when you notice increased backlash or vibration. As a rough guide, replace it when the elastomer shows visible cracking, compression set, or the coupling develops play. We supply replacement spiders separately.

What are the different spider materials?

Our standard spider is TPU polyurethane, which offers a good balance of damping, stiffness and temperature resistance. Other durometers are available on request for special torque or damping requirements.

Is the jaw coupling maintenance-free?

Nearly — the only wear part is the spider, which is designed to be replaced. The aluminum hubs themselves last the life of the machine.

Quick specs

Outer diameter14 – 120 mm

Bore3 – 78 mm

Torque0.2 – 520 N·m

Speed3,000 – 46,000 rpm

BacklashZero

MaterialSee specs

🎯 Free Selection Help

Not sure which model fits? Send us your motor model, torque and shaft sizes — our engineers will recommend the exact part number, free of charge.

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Aluminum Jaw Coupling (Clamp Type)