Torque Limiters SK

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MODEL SERIES SK	SK1 / SKP	SK2	SK3	SK5	ES2	ESL	ST1
	General \| technical information \| 2D and 3D download

Possible function systems for R+W Torque Limiters:
Single-position | Multi-position | Load holding | Full disengagement

Model SK5 technical information

Torque Limiter with clamping hub.
Safety Coupling press-fit version .

Series from 0.1 - 850 Nm

Optional sealed version for wash down and foodservice application.

Data table and downloads Torque Limiter SK5

Model SK5		Series
		1.5	2		4.5		10		15		30		60		80		150		300		500		800
Adjustment range available from - to (approx. values) (Nm)	T_KN	0.1-0.6 0.4-1 0.8-1.5	0.2-1.5 0.5-2		1-3 3-6		2-6 4-12		5-10 8-20		10-25 20-40		10-30 25-80		20-70 30-90		20-70 45-150		100-200 150-240 200-320		80-200 200-350 300-500		400-650 500-800 650-850
Adjustment range available from - to (approx. values), full disengagement (Nm)	T_KN	0.3-0.8 0.6-1.3	0.5-2		2.5-4.5		2-5 5-10		7-15		8-20 16-30		20-40 30-60		20-60 40-80		80-150		120-200 160-300		60-150 100-300 250-500		200-400 450-800
Overall length +0,5 (mm)	A	44	48	54	60	68	70	79	76	83	89	97	105	115	115	127	116	128	143	157	166	180	196
Overall length +0,5, full disengagement (mm)	A^F	44	48	54	60	68	70	79	76	83	89	97	105	115	117	129	118	130	146	160	170	184	207
Actuation ring Ø (mm)	B	23	29		35		45		55		65		73		92		92		120		135		152
Actuation ring Ø, full disengagement (mm)	B^F	24	32		42		51.5		62		70		83		98		98		132		155		177
Fit length (mm)	C¹ / C²	14/11	16/13		19/16		21/16		28/22		33/27		39/31		43/35		43/35		52/42		61/52		74/48
Inner diameter from Ø to Ø H7 (mm)	D¹	3-8	4-12		5-16		5-20		8-22		10-25		12-32		14-38		14-38		30-56		35-60		40-62
Inner diameter from Ø to Ø H7 (mm)	D²	3-8	4-12		5-14		5-20		8-26		10-30		12-32		14-42		14-42		30-60		35-60		40-75
Outer diameter of coupling (mm)	E	19	25		32		40		49		55		66		81		81		110		123		134
Distance (mm)	F	12	13		15		17		19		24		30		31		31		35		45		50
Distance, (full disengagement) (mm)	F^F	11.5	12		14		16		19		22		29		31		30		36		43		54
Distance (mm)	G	3.5	4		5		5		6.5		7.5		9.5		11		11		13		17		18
Distance between centers (mm)	H	6	8		10		15		17		19		23		27		27		39		41		2x48
Screw ISO 4762	I	M2.5	M3		M4		M4		M5		M6		M8		M10		M10		M12		M16		2xM16
Tightening torque (Nm)	I	1	2		4		4.5		8		15		40		50		70		130		200		250
Pretensioning, approx.	K	0.1-0.5	0.2-0.7		0.2-0.7		0.2-1.0		0.2-1.0		0.5-1.0		0.5-1.0		0.5-1.0		0.5-1.0		0.5-1.5		0.5-2.0		0.5-2.0
Axial recovery of coupling max (N)		4	8	5	15	10	25	30	20	12	50	30	70	45	48	32	82	52	157	106	140	96	200
Approx. weight (kg)		0.038	0.07		0.2		0.3		0.4		0.6		1.4		2		2.4		5.9		9.6		15
Moment of interia (10^-3 kgm²)	J_ges	0.01	0.01	0.01	0.02	0.02	0.06	0.07	0.10	0.15	0.27	0.32	0.75	0.80	1.80	1.90	2.50	2.80	6.5	7.0	13.0	17.0	50
Torsional stiffness (10³ Nm/rad)	C_T	0.7	1.2	1.3	7	5	8	7	12	10	18	16	40	31	68	45	90	60	220	190	260	250	390
Lateral misalignment max. (mm)		0.15	0.15	0.20	0.20	0.25	0.20	0.30	0.15	0.20	0.20	0.25	0.20	0.25	0.20	0.25	0.20	0.25	0.25	0.30	0.30	0.35	0.35
Angular misalignment max. (degrees)		1	1	1.5	1.5	2	1.5	2	1	1.5	1	1.5	1	1.5	1	1.5	1	1.5	1.5	2	2	2.5	2.5
Lateral spring stiffness (N/mm)		70	40	30	290	45	280	145	475	137	900	270	1200	420	920	290	1550	435	3750	1050	2500	840	2000
Actuation path (mm)		0.7	0.8		0.8		1.2		1.5		1.5		1.7		1.9		1.9		2.2		2.2		2.2
Downloads Short Version		1.5	2		4.5		10		15		30		60		80		150		300		500		800
2D-DXF (single-position, load holding, multi-position)
3D-EXE (single-position, load holding, multi-position)
3D-STEP (single-position, load holding, multi-position)
2D-DXF (full disengagement)
3D-EXE (full disengagement)
3D-STEP (full disengagement)
Downloads Long Version		1.5	2		4.5		10		15		30		60		80		150		300		500		800
2D-DXF (single-position, load holding, multi-position)
3D-EXE (single-position, load holding, multi-position)
3D-STEP (single-position, load holding, multi-position)
2D-DXF (full disengagement)
3D-EXE (full disengagement)
3D-STEP (full disengagement)

A^F, B^F, L^F = full disengagement version

Ordering specifications
Order example for Torque Limiter SK5 Order example for Torque Limiter SK5
Possible versions
W = Single-position engagement
D = Multi-position engagement
G = Load holding
F = Full disengagement

Design details of torque limiter SK5

Six self-centering, tapered drive projections
(2) have been formed into the taper segment,
which has been molded onto an aluminium
hub (1).

The six projections are configured conically in
a longitudinal direction (3). The mating-piece
consists of a metal bellows with a tapered
female element (4).

Absolutely backlash-free torque transmission
is ensured due to the axial pretensioning (5) of
the metal bellows during mounting. This slight
pretensioning has no negative influence on the
operation of the metal bellows or on the shaft
bearing.

Possible applications for backlash-free, press-fit torque limiter SK5

(1) Applications with limited accessibility.
The dismounting of a singlepiece
coupling is too labor intensive.

(2) The press fit design allows the
motor or gear box unit to be removed
by simply pulling it out when
servicing is required.

Dismounting the coupling is possible
without loosening the hub fastening
screws. Therefore, clamping
screw access holes are not required.

Last update: 14-01-2009