Jaw Coupling Half 8mm Series 08

ID: 3427_0

This aluminium jaw coupling fits a 8mm shaft and connects to another half coupling with a spider.

Discontinued

Replaced by the TRM4313, a shaft coupler with the same bore but different size.

This jaw type half-coupling can be used to connect a 8mm shaft to another shaft. It is held in place by two set screws, and fits together with another CL8-25 series jaw coupling of any shaft size with a hard elastomer spider in between.

Jaw type couplings are ideal for high-torque applications and applications where shafts of two different sizes need to be coupled. This series of couplers are rated for torques as high as 60 kg·cm and speeds of up to 16000 rpm.

If you're having trouble with slipping, you can file a groove into the shaft where the set screws hold it in place. You can also use a Loctite adhesive on the set screws to ensure that they remain in place.

Assembly

This jaw type half-coupling connects to any other half-coupling in the CL8-25 series with a coupling spider pressed in between. The other half and the spider are both sold separately. See the Connection & Compatibility tab for a complete list.

Jaw Coupling Spider

You'll need a coupling spider to connect this jaw coupling to another. You can find a list of compatible spiders below:

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Jaw Couplings

Jaw couplings are designed to connect to other jaws in the same series, which gives you the option of coupling two differently sized shafts together. Between the two jaw couplings, a coupling spider is used to hold them in place while still allowing for a small amount of flex. The jaw couplings in the list below will fit together with this coupling:

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Rotary Shaft

If you're building a rotary transmission system of any kind, chances are you'll need some rotary shaft. Here's a list of rotary shaft compatible with this shaft coupler:

Product		Physical Properties
Part Number	Price	Diameter
TRM4000_0 8mm Precision Ground Rotary Shaft	$6.50/Meter	8 mm

Ball Screws

Ball screws provide an easy means of converting rotary motion into precise linear positioning. You can use this shaft coupler to connect a motor shaft to the following ball screws:

Product		Physical Properties
Part Number	Price	Length
LMN4100_0 Ball Screw SFU01204 x 200mm w/Nut	$33.30	200 mm
LMN4101_0 Ball Screw SFU01204 x 300mm w/Nut	$37.00	300 mm
LMN4102_0 Ball Screw SFU01204 x 400mm w/Nut	$40.70	400 mm
LMN4103_0 Ball Screw SFU01204 x 500mm w/Nut	$44.40	500 mm
LMN4104_0 Ball Screw SFU01204 x 600mm w/Nut	$46.65	600 mm
LMN4105_0 Ball Screw SFU01204 x 800mm w/Nut	$53.30	800 mm
LMN4106_0 Ball Screw SFU01204 x 1000mm w/Nut	$59.20	1 m

Stepper Motors

Stepper motors have high torque and precise position control. This shaft coupler can connect to the main shaft of the following stepper motors:

Product		Physical Properties		Motor Properties	Electrical Properties	Gearbox Properties
Part Number	Price	Shaft Diameter	Mounting Plate Size	Rated Torque	Recommended Voltage	Gearbox Type	Gear Ratio
3325_0 NEMA17 - 1.8 Degree - 1.68A Stepper - 5.18:1 Gearbox	$40.00	8 mm	NEMA - 17	18 kg·cm	24 V DC	Planetary	5 ²⁄₁₁ : 1
3326_0 NEMA17 - 1.8 Degree - 1.68A Stepper - 14:1 Gearbox	$42.00	8 mm	NEMA - 17	30 kg·cm	24 V DC	Planetary	13 ²¹²⁄₂₈₉ : 1
3327_0 NEMA17 - 1.8 Degree - 1.68A Stepper - 27:1 Gearbox	$44.00	8 mm	NEMA - 17	30 kg·cm	24 V DC	Planetary	26 ¹⁰³⁄₁₂₁ : 1
3328_0 NEMA17 - 1.8 Degree - 1.68A Stepper - 51:1 Gearbox	$46.00	8 mm	NEMA - 17	48 kg·cm	24 V DC	Planetary	50 ⁴³⁹⁷⁄₄₉₁₃ : 1
3329_0 NEMA17 - 1.8 Degree - 1.68A Stepper - 100:1 Gearbox	$48.00	8 mm	NEMA - 17	48 kg·cm	24 V DC	Planetary	99 ¹⁰⁴⁴⁄₂₀₅₇ : 1

Brushless DC Motors

Brushless DC motors combine smooth rotation with accurate position control. This shaft coupler can connect to the following BLDC Motors:

Product		Physical Properties	Motor Properties
Part Number	Price	Shaft Diameter	Rated Torque	Rated Speed
DCM4101_0 NEMA17 - Brushless DC Motor - 4.9:1 Gearbox	$72.00	8 mm	5.6 kg·cm	810 RPM
DCM4102_0 NEMA17 - Brushless DC Motor - 15:1 Gearbox	$74.00	8 mm	16.3 kg·cm	260 RPM
DCM4103_0 NEMA17 - Brushless DC Motor - 24:1 Gearbox	$76.00	8 mm	24.5 kg·cm	166 RPM
DCM4104_0 NEMA17 - Brushless DC Motor - 56:1 Gearbox	$80.00	8 mm	61.2 kg·cm	70 RPM
DCM4106_0 NEMA23 - Brushless DC Motor - Gearless	$42.00	8 mm	2.9 kg·cm	4000 RPM
DCM4112_0 NEMA23 - Brushless DC Motor - Gearless	$65.00	8 mm	5 kg·cm	4000 RPM

DC Motors

DC motors are the simplest and most common option for rotary motion in many projects. This shaft coupler can connect to the main shaft of the following DC motors:

Product		Physical Properties	Motor Properties	Electrical Properties	Gearbox Specifications
Part Number	Price	Shaft Diameter	Rated Torque	Rated Voltage	Gearbox Type	Gear Ratio
3265_0 12V/0.5Kg-cm/670RPM 3.7:1 DC Gear Motor	$38.00	8 mm	540 g·cm	12 V DC	Planetary	3 ¹²⁄₁₇ : 1
3266_1 12V/1.9Kg-cm/175RPM 14:1 DC Gear Motor	$42.00	8 mm	1.9 kg·cm	12 V DC	Planetary	13 ²¹²⁄₂₈₉ : 1
3267_1 12V/6.6Kg-cm/49RPM 51:1 DC Gear Motor	$43.00	8 mm	6.6 kg·cm	12 V DC	Planetary	50 ⁸⁰¹⁄₈₉₅ : 1
3267_0 12V/6.6Kg-cm/49RPM 51:1 DC Gear Motor	$33.00	8 mm	6.6 kg·cm	12 V DC	Planetary	50 ⁸⁰¹⁄₈₉₅ : 1
3268_1 12V/17.3Kg-cm/18RPM 139:1 DC Gear Motor	$43.00	8 mm	17.3 kg·cm	12 V DC	Planetary	* 139 ¹⁸⁴⁄₁₂₂₁ : 1
DCM4000_0 24V/2.5Kg-cm/3280RPM DC Motor	$40.00	8 mm	4 kg·cm	24 V DC	—	—

Product Specifications

Physical Properties
Manufacturer Part Number	CL8-25 8mm
Material	Aluminium
Coupling Rated Torque	60.7 kg·cm
Coupling Rated Speed	16000 RPM
Torsional Stiffness	63 N·m/rad
Shaft Angularity Tolerance	1°
Shaft Eccentricity Tolerance	20 μm
Inner Diameter	8 mm
Screw Thread Size	M4
Weight	42 g
Customs Information
Canadian HS Export Code	8483.60.00
American HTS Import Code	8483.60.80.00
Country of Origin	CN (China)

Documents

More 8mm shaft couplings:

Product		Physical Properties
Part Number	Price	Inner Diameter	Material	Coupling Rated Torque	Coupling Rated Speed	Torsional Stiffness
TRM4334_0 Spiral Beam Coupling 8mm - 8mm	$3.35	8 mm	Aluminium	10 kg·cm	8000 RPM	110 N·m/rad
TRM4313_0 Jaw Coupling Half 8mm Series 12	$3.00	8 mm	Aluminum	35.7 kg·cm	12000 RPM	—

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