Safety and disengageable couplings

Safety couplings, also called torque limiter couplings, are used as torque limiters and as protection against overload. They provide a quick and reliable interruption of the drive component and the driven component if a torque exceeds a preset level.

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Different safety and disengageable couplings on blue background

The safety couplings provide a quick and reliable interruption of the drive component and the driven component if a torque stop exceeds a preset level. This helps prevent damage and downtime. Safety couplings offered by BJ-Gear operate as overload breakaway devices and operate on a spring-loaded ball bearing principle. The safety couplings provide a rigid transmission without any backlash during normal operation, and the ball will be released from the bearings to disengage the drive line if the application torque surpasses a preset limit.

BJ-Gear offers safety couplings from German KBK Antriebstechnik and R+W Couplings.

From KBK we offer safety couplings with ball bearings, safety couplings with metal bellow as well as safety couplings with elastomer inserts as the compensating element. Safety couplings from KBK have a shaft diameter between 3-70 mm depending on model and a torque range of 3-1400 Nm. From R+W we offer safety couplings with torques up to 250 kNm and a shaft diameter up to 340 mm.

Safety couplings from R+W

Safety and disengageable couplings

BJ-Gear offers six different models of R+W's safety couplings with torques up to 250 kNm and a shaft diameter up to 340 mm.

ES2 - Torque limiter with clamping hub, press-fit version for direct drives
	Six different sizes: 5, 10, 20, 60, 150 and 300. Elastomer insert Reliable torque overload protection Short compact design Press fit design. Backlash free Disengage within m.secs.
ESL - Torque limiter, economy class with clamping hub, press-fit version for direct drives
	Five different sizes: 5, 10, 20, 60, and 150 Elastomer insert Reliable torque overload protection Compact, simple, economical and press fit design Multi position engagement Low wear Backlash free
SK1 - Torque limiter with conical clamp
	14 different sizes: 1.5, 2, 4.5, 10, 15, 30, 60, 150, 200, 300, 500, 800, 1500, 2500 Torque from 0,1-2800 Nm Precise torque overload protection Absolutely backlash-free and torsionally rigid Compact, simple design Disengagement detection achieved through high indexing ring movement Low residual friction following disengagement Low moment of inertia Self-adjusting Disengagement within 1 - 3 msecs.
SK2 - Torque limiter with clamping hub for direct drives
	14 different sizes: 1.5, 2, 4.5, 10, 15, 30, 60, 80, 150, 200, 300, 500, 800, 1500 Torque: 0.1-1800 Nm Absolutely backlash-free and torsionally rigid Easy mounting and dismounting Adjustable settings Electrically ant thermally insulated Compensation of shaft misalignments Low moment of inertia Actuation ring moves to trigger external sensor Disengagement within 1 - 3 msecs
SLN/SLP - Torque limiter - with clamping hub for indirect drives or with pure keyway connection
	4 different sizes: 30, 60, 150 and 300 Torque: 10-700 Nm Extremely lightweight construction Integral bearing for timing belt pulley or sprocket Compact, simple construction Torque setting is continuously variable SLP: simple keyed connection / SLN: frictional clamp connection Simple to install
ST1 - Torque limiter with keyway connection for indirect drives
	9 sizes: 2, 5, 10, 25, 40, 60, 100, 160, 250 Torque: 0.2-250 kNm Compact, simple design Precise overload protection Torsionally rigid Integral bearings for timing belt, pulley or sprocket

Safety couplings from KBK

Safety and disengageable couplings

BJ-Gear offers eight different models of KBK's safety couplings with ball bearings. They are ideal for mounting pulleys and sprockets.

KBK/LP and KBK/LLP - with key way
	Backlash-free Easy assembly with key way Torque range: 3-1400 Nm Version "LL" with two ball bearings for high radial loads
KBK/LK and KBK/LLK - with collet clamp and two bearings
	Backlash-free Fast assembly with clamp hub Torque range: 0.2-500 Nm Version "LL" with two ball bearings for high radial loads
KBK/LI and KBK/LLI - with cone and two bearings
	Backlash-free Compact inner conical hub, high clamping forces Torque range: 3-1400 Nm Version "LL" with two ball bearings for high radial loads
KBK/LA and KBK/LLA - with outer cone
	Backlash-free Self-centering and self-releasing outer conical hub, very high clamping forces Torque range: 3-1400 Nm Version "LL" with two ball bearings for high radial loads

Safety couplings with elastomer spider

Safety and disengageable couplings

We offer four different models of KBK's safety couplings with elastomer spider as compensating element. They all have vibration dampening, they compensates for shaft misalignment, they are pluggable, and they have different spiders available for modifying the coupling characteristics.

KBK/EKP- with collet clamp and key way
	Backlash-free With clamp hub and key way Torque range: 3-500 Nm Outer diameter: 49-129 mm Bore diameter: 4-50 mm
KBK/EKK - with two collet clamps
	Backlash-free With clamp hubs for fast and easy assembly Torque range: 3-500 Nm Outer diameter: 49-129 mm Bore diameter: 4-62 mm
KBK/EKI - with collet clamp and inner cone
	Backlash-free With clamp hub and inner conical hub with high clamping forces Torque range: 3-500 Nm Outer diameter: 49-129 mm Bore diameter: 4-55 mm
KBK/EKA - with collet clamp and outer cone
	Backlash-free With clamp hub and self-centering outer conical hub Torque range: 3-500 Nm Outer diameter: 49-129 mm Bore diameter: 4-55 mm