Starflex: Complete Couplings

The Starflex Jaw Coupling has a simple construction consisting of two aluminum hubs and a polyurethane elastomer insert.

The elements are available in three different configurations, varying in hardnesses and tightness of fit, so that a selection dependent on torque transmission responsiveness and amount of misalignment can be made.

Since the design pre-compresses the element, it can also be used to deliver rotation without backlash. Starflex couplings are available with either clamping hubs (Type ALS-B) or set screw hubs (Type ALS-H).

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Highlights and Features

The Starflex flexible jaw shaft coupling is widely used, with confidence, in a multitude of applications. With a large range of options, robust design and damping features, the Starflex shaft coupling is a cost effective leader in its field. product advantages include;

Equalizes offsets in the event of shaft misalignment.
Secure transmission of torques from 1.2Nm up to 1050 Nm
Damping capabilities in the event of resonance problems.
High torsional stiffness.
Zero backlash operation.
Three element types to suited different torque and dampening requirements:
- RED: 97 Sh-A, tight fit.
- YELLOW: 90 Sh-A, tight fit
- BLUE: 97 Sh-A, loose fit

Rotary Proposal

Starflex ALS-B: Clamp Type

Specifications:

Model	Torque		Misalignment			Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
Model	Nominal (Nm)	Max (Nm)	Parallel (mm)	Angular (deg)	Axial (mm)	Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
ALS-014-R	2	4	0.1	1	+0.6	10000	21	380	1.98E-07	0.007
ALS-020-R	5	10	0.1	1	+0.8	10000	43	400	1.09E-06	0.019
ALS-030-R	12.5	25	0.1	1	+1.0	10000	136	650	6.19E-06	0.045
ALS-040-R	17	34	0.1	1	+1.2	10000	1550	1700	4.01E-05	0.16
ALS-055-R	60	120	0.1	1	+1.4	7000	2000	1350	1.63E-04	0.34
ALS-065-R	160	320	0.1	1	+1.5	5900	3100	1400	3.69E-04	0.54
ALS-080-R	325	650	0.1	1	+1.8	4800	6000	1710	1.04E-03	1.00

Red spider element: 97 Shore A, Tight-fit type

Model	Torque		Misalignment			Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
Model	Nominal (Nm)	Max (Nm)	Parallel (mm)	Angular (deg)	Axial (mm)	Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
ALS-014-Y	1.2	2.4	0.1	1	+0.6	10000	12	200	1.98E-07	0.007
ALS-020-Y	3	6	0.15	1	+0.8	10000	24	210	1.09E-06	0.019
ALS-030-Y	7.5	15	0.15	1	+1.0	10000	73	330	6.19E-06	0.045
ALS-040-Y	10	20	0.1	1	+1.2	10000	760	940	4.01E-05	0.16
ALS-055-Y	35	70	0.15	1	+1.4	7000	1400	1160	1.63E-04	0.34
ALS-065-Y	95	190	0.15	1	+1.5	5900	2100	1200	3.69E-04	0.54
ALS-080-Y	190	380	0.15	1	+1.8	4800	4000	1430	1.04E-03	1.00

Yellow spider element: 90 Shore A, Tight-fit type

Model	Torque		Misalignment			Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
Model	Nominal (Nm)	Max (Nm)	Parallel (mm)	Angular (deg)	Axial (mm)	Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
ALS-030-B	12.5	25	0.17	1	-0.2 / +1.0	10000	90	460	6.07E-06	0.045
ALS-040-B	17	34	0.2	1	-0.5 / +1.2	10000	400	640	4.00E-05	0.16
ALS-055-B	60	120	0.22	1	-0.2 / +1.4	7000	1150	400	1.63E-04	0.34
ALS-065-B	160	340	0.25	1	-0.6 / +1.5	5900	2000	800	3.69E-04	0.54
ALS-080-B	325	650	0.28	1	-0.9 / +1.8	4800	4550	600	1.04E-03	1.00

Blue spider element: 97 Shore A, Loose-fit type

Dimensions:

Starflex ALS Clamp dimensions

Model	d1 - d2		D	DB	L	L1-L2	E	S	B	G	M	Tightening Torque (Nm)
Model	Min	Max	D	DB	L	L1-L2	E	S	B	G	M	Tightening Torque (Nm)
ALS-014	3	6	14	16.1	22	7	8	1	3.5	4.8	1-M2	0.4
ALS-020	4	8	20	20	30	10	10	1	5	6.5	1-M2.5	1
ALS-030	6	14	30	30	35	11	13	1.5	5.5	10.5	1-M3	1.5
ALS-040	8	20	40	43.2	66	25	16	2	12.5	15	1-M5	7
ALS-055	10	28	55	55	78	30	18	2	10.5	20	1-M6	14
ALS-065	14	35	65	69.8	90	35	20	2.5	11.5	24.5	1-M8	30
ALS-080	19	45	80	80	114	45	24	3	11.5	30	1-M8	30

Starflex ALS-H: Set Screw Type

Specifications:

Model	Torque		Misalignment			Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
Model	Nominal (Nm)	Max (Nm)	Parallel (mm)	Angular (deg)	Axial (mm)	Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
ALS-014-R	2	4	0.1	1	+0.6	34100	21	380	1.91E-07	0.007
ALS-020-R	5	10	0.1	1	+0.8	23800	43	400	1.08E-06	0.018
ALS-030-R	12.5	25	0.1	1	+1.0	15900	136	650	6.25E-06	0.047
ALS-040-R	17	34	0.1	1	+1.2	11900	1550	1700	3.87E-05	0.15
ALS-055-R	60	120	0.1	1	+1.4	8700	2000	1350	1.66E-04	0.35
ALS-065-R	160	320	0.1	1	+1.5	7400	3100	1400	3.57E-04	0.51
ALS-080-R	325	650	0.1	1	+1.8	6000	6000	1710	1.06E-03	1.01
ALS-095-R	450	900	0.1	1	-0.5 / +2.0	5000	10000	4200	2.24E-03	1.5
ALS-105-R	525	1030	0.15	1	-0.9 / +2.0	4500	12000	5000	3.72E-03	2.05

Red spider element: 97 Shore A, Tight-fit type

Model	Torque		Misalignment			Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
Model	Nominal (Nm)	Max (Nm)	Parallel (mm)	Angular (deg)	Axial (mm)	Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
ALS-014-Y	1.2	2.4	0.1	1	+0.6	34100	12	200	1.91E-07	0.007
ALS-020-Y	3	6	0.15	1	+0.8	23800	24	210	1.08E-06	0.018
ALS-030-Y	7.5	15	0.15	1	+1.0	15900	73	330	6.25E-06	0.047
ALS-040-Y	10	20	0.1	1	+1.2	11900	760	940	3.87E-05	0.15
ALS-055-Y	35	70	0.15	1	+1.4	8700	1400	1160	1.66E-04	0.35
ALS-065-Y	95	190	0.15	1	+1.5	7400	2100	1200	3.57E-04	0.51
ALS-080-Y	190	380	0.15	1	+1.8	6000	4000	1430	1.06E-03	1.01
ALS-095-Y	265	530	0.1	1	-0.5 / +2.0	5000	6000	2400	2.24E-03	1.5
ALS-105-Y	310	620	0.15	1	-0.9 / +2.0	4500	7000	4000	3.72E-03	2.05

Yellow spider element: 90 Shore A, Tight-fit type

Model	Torque		Misalignment			Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
Model	Nominal (Nm)	Max (Nm)	Parallel (mm)	Angular (deg)	Axial (mm)	Max rotation speed (RPM)	Static Torsional Stiffness (Nm/rad)	Radial Stiffness (N/mm)	Moment of innertia (kgm^2)	Mass (kg)
ALS-030-B	12.5	25	0.17	1	-0.2 / +1.0	15900	90	460	6.13E-06	0.045
ALS-040-B	17	34	0.2	1	-0.5 / +1.2	11900	400	640	3.86E-05	0.15
ALS-055-B	60	120	0.22	1	-0.2 / +1.4	8700	1150	400	1.66E-04	0.35
ALS-065-B	160	320	0.25	1	-0.6 / +1.5	7400	2000	800	3.57E-04	0.51
ALS-080-B	325	650	0.28	1	-0.9 / +1.8	6000	4550	600	1.06E-03	1.01
ALS-095-B	450	900	0.32	1	-0.5 / +2.0	5000	12000	800	2.22E-03	1.48
ALS-105-B	525	1050	0.36	1	-0.9 / +2.0	4500	15000	2000	3.70E-03	2.02

Blue spider element: 97 Shore A, Loose-fit type

Dimensions:

Starflex ALS Key Way dimensions

Model	d1 - d2		D	L	L1-L2	E	S	C
Model	Min	Max	D	L	L1-L2	E	S	C
ALS-014	3	6.5	14	22	7	8	1	3.5
ALS-020	4	9.6	20	30	10	10	1	5
ALS-030	6	14	30	35	11	13	1.5	5.5
ALS-040	8	22	40	66	25	16	2	12.5
ALS-055	10	28	55	78	30	18	2	15
ALS-065	14	38	65	90	35	20	2.5	17.5
ALS-080	19	45	80	114	45	24	3	22.5
ALS-095	19	55	95	126	50	26	3	25
ALS-105	19	60	105	140	56	28	3.5	28

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Starflex: Complete Couplings

Highlights and Features

Starflex ALS-B: Clamp Type

Starflex ALS-H: Set Screw Type

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Starflex: Complete Couplings

Highlights and Features

Starflex ALS-B: Clamp Type

Starflex ALS-H: Set Screw Type

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