ENEMAC

Definition Torque Limiter ( Safety Couplings )
Torque Limiter are used to protect machines ( Safety Couplings ), equipments and people against damages. The drive is disconnected, when the torque is higher than the disengagement torque of the coupling.

Application of Torque Limiter ( Safety Couplings )
With increasing automation of production lines those components are gaining rising importance, which in case of overload protect machines from damages or iniate automatical shut off. The performance rates e.g. of servo drives especially in NC-machine tools are raised from year to year. Combined with it the rapid traverse rates increase. At these high-speed movements in the machine, a collision results in severe machine damage and expensive outage time. Safety Couplings are used to protect against these damages or at least to reduce them. Torque Limiter can be used everywhere in such equipment where torque limitation is necessary in order to protect machinery or products against overloading.

Definition shaft couplings

Shaft couplings are compensating couplings with a backlash free and conformal torque transfer providing high torsional stiffness and a low moment of inertia. According to these requirements, our metal bellow couplings can be regarded as the ideal solution. For more than 25 years, they have proven themselves in thousands of servo drives as being excellent.

Definition shaft couplings Shaft couplings are compensating couplings with a backlash free and conformal torque transfer providing high torsional stiffness and a low moment of inertia. According to these requirements, our metal bellow couplings can be regarded as the ideal solution. For more than 25 years, they have proven themselves in thousands of servo drives as being excellent.

Shaft Couplings EWA EWB EWF EWC EWD EWC
type	specification	torques	main applications / characteristics
EWA	6-corrugation bellow rolled in mounting friendly clamp system cost-effective standard series	7 - 1300 Nm	shaft-/shaft-connections, temperature up to 300°C
EWB	4-corrugation bellow rolled in, short design mounting friendly clamp system high torsional stiffness	7 - 600 Nm	shaft-/shaft-connections with high torsional stiffness temperature up to 300°C
EWF	4-corrugation bellow welded, short design mounting friendly clamp system high torsional stiffness	5 - 1300 Nm	shaft-/shaft-connections with high torsional stiffness complete steel version, temperature up to 350°C
EWC	4-corrugation bellow welded, short design STAINLESS STEEL	5 - 1300 Nm	shaft-/shaft-connections in the food-industrie temperature up to 350°C, dimensions like EWF
EWD	radial clamping hub on both sides plug in backlash free	8 - 1000 Nm	shaft-/shaft-connections, oscillation dampening temperature up to 120°C
EWE	with conical hub and clamping ring rotary symetric design	10 - 1000 Nm	shaft-/shaft-connections, oscillation dampening temperature up to 120°C, high speed
© 2009 ENEMAC

Torque Limiter (Safety Couplings) ECA ECP ECPB ECPD ECB ECOL ECC
type	specification		disengagement torques	main applications
ECA	with integrated ball bearing (for direct mounting of a pulley)		0.5 - 400 Nm	toothed belt drives, the drive element does not need its own bearing on the shaft
ECP	NEW ! with integrated ball bearing (for direct mounting of a pulley) and mounting friendly clamping hub compact performance		2 - 800 Nm	toothed belt drives, the drive element does not need its own bearing on the shaft
ECPB	NEW ! with metal bellow coupling and mounting friendly clamping hub on both sides compact performance		2 - 800 Nm	shaft-/shaft-connections, the metal bellow can compensate shaft misalignments
ECPD	NEW ! with elastomer coupling and mounting friendly clamping hub on both sides compact performance		2 - 800 Nm	shaft-/shaft-connections, the elastomer spider can compensate shaft misalignments
ECB	for various drive units		1.2 - 400 Nm	mounting flanges, the drive element must have its own bearing on the shaft
ECOL	NEW ! with integrated slide bearing and mounting friendly clamping hub compact performance		2 - 800 Nm	toothed belt drives, the drive element does not need its own bearing on the shaft
ECC	combination of type ECB with metal bellow coupling		1.2 - 400 Nm	shaft-/shaft-connections, the metal bellow can compensate shaft misalignments
shaft-/hub = cone bushings on ECA, ECB, ECC shaft-/hub = clamping hubs on ECOL, ECP, ECPB, ECPD			main features
on request type ECA and ECC can be delivered in STAINLESS STEEL, too			transmission of torque without backlash light components, low disengagement delay fixed point switching, one engage per 360° - other engages possible continuously adjustable disengagement torque - without change the disc spring decreasing characteristic - with a negativ disc spring characteristic easy activation of an proximity switch - with switchplate


Torque Limiter ECE ECG ECI ECH ECR
type	specification		disengagement torques	main applications
ECE	compact, axially short version		2 - 630 Nm	mounting flanges, the drive element must have its own bearing on the shaft
ECG	with small bearing for drive elements (small pulleys or chain wheels)		2 - 630 Nm	chain drives + small belt drives, a slide bearing must be incorporated in the drive element by the customer
ECI	with bearing for extra-wide pulleys		2 - 630 Nm	toothed belt drives, a slide bearing must be incorporated in the drive element by the customer
ECH	compact design with integrated sprocket and slide bearing		2 - 630 Nm	chain drives, interchangeable with slip clutches, the drive element does not need its own bearing on the shaft
ECR	all parts STAINLESS STEEL (including the disc spring)		15 - 240 Nm	drives in the food industry, (types ECE, ECG and ECI are also available in STAINLESS STEEL)

shaft-/hub = keyway		examples		main features
				low play robust, compact, small installation unaffected by oil and grease fixed point switching, one engage per 360° - other engages possible continuously adjustable disengagement torque - without changing the disc spring decreasing characteristic - with a negativ disc spring characteristic
© 2008 ENEMAC