Safety Locks

Safety Locks similar to Safety Catchers and Safety Brakes are used against failure of lifting members. But in contrast to those they are not suitable to decelerate masses or to dissipate kinetic energy. On the other hand, the rod displacement to build up the holding force is very small, so that this units can be used for a approximitive positioning tasks as well. Furthermore this design principle allows compact solutions even for small rod sizes (smaller than for Safety Catchers). In the field of pneumatic clamping devices the Safety Locks are providing the absolutely highest holding forces in relation to housing dimensions.

Applications

Mobile Man Lift

Safety for telescopic arm with an elevation of 101 m >>

Industrial Robotics

Holding up the gripper in case of a power-failure or emergency stop >>

Injection Moulding machine

Securing vertical axis >>

Theater Lifting Stages

Ratchless fixation of the workpiece >>

Type Selection

Actuation
Safety Locks are held open by hydraulic (100 bar min) or pneumatic (3,5 bar min) mean and clamp when pressure drops.

Direction of load
In most applications Safey Locks are mounted on a baseplate, so that the load causes a compressive force to the mounting surface. But if the application requires an upward absorption of the load, a flange for attachment is required as well as a special design of the Safety Lock housing regarding the tensile load. (For tensile load versions please contact us)

Dimensions

SITEMA Safety Locks hydraulic / for compressive load For complete measurements see: S11 - Dimensions, hydraulic / compressive load
Type	Ident.-No.	Rod Ø mm	Admiss. load kN	Release press. bar	Casing Ø mm	Casing height mm
KRG 18	KRG 018 01	18	7	100	68	122	Inquiry	CAD
KRG 22	KRG 022 01	22	10	100	74	130	Inquiry	CAD
KRG 28	KRG 028 01	28	20	100	102	170	Inquiry	CAD
KRG 36	KRG 036 01	36	50	100	120	204	Inquiry	CAD
KRG 45	KRG 045 01	45	75	100	125	230	Inquiry	CAD
KRG 56	KRG 056 01	56	100	100	155	238	Inquiry	CAD
KRG 70	KRG 070 01	70	150	100	170	272	Inquiry	CAD
KRG 90	KRG 090 01	90	250	100	210	306	Inquiry	CAD
KRG 110	KRG 110 01	110	400	100	265	385	Inquiry	CAD

SITEMA Safety Locks pneumatic / for compressive load For complete measurements see: S12 - Dimensions, pneumatic / compressive load
Type	Ident.-No.	Rod Ø mm	Admiss. load kN	Release press. bar	Casing Ø mm	Casing height mm
KRGP 16	KRGP 016 20	16	5	3,5	82	109	Inquiry	CAD
KRGP 22	KRGP 022 20	22	10	3,5	102	132	Inquiry	CAD
KRGP 28	KRGP 028 20	28	20	3,5	155	166	Inquiry	CAD

Accessories

Auto-Bleeder

Air in hydraulic systems can cause various problems. Especially the dieseling-effect (compression-ignition of air-oil mixture) can cause damages to seals and sealing surfaces. Clamping devices are exceptionally in danger to this effect, due to their small hydraulic volume. Especially if the Clamping Device is situated on the very top of the hydraulic system a single manual bleeding is not always sufficient. At least in these cases an Auto-Bleeder is strongly recommended.