Subject to modification without prior notice SITEMA GmbH & Co. KG . G.-Braun-StralJe 13 . D-76187 Karlsruhe . Phone: +49(0)721/98661-0 . Fax: -11 . www.sitema.com

Delivery including centering ring A or B matching the cylinder mounting style. IMPORTANT: Please indicate the desired type in your order (see chapter ’’Mounting to a cylinder, one page 4). Mounting without centering ring is not permissible. Ring C for mounting without cylinder on request. Order example for Locking Unit KFHA 40-18, 50 bar, with centering ring B: KFHA 040 018 050-1 (ring B) O The nominal holding force F is the minimum holding force for dry or hydraulic-oil wetted rods. 0 The pressure p is required to release the clamping. The admissible operating pressure is 160 bar. 0 As supplied,...

Subject to modification without prior notice SITEMA GmbH & Co. KG . G.-Braun-StraRe 13 . D-76187 Karlsruhe . Phone: +49(0)721/98661-0 . Fax: -11 . www.sitema.com

Technical Data Sheet SITEMA - Locking Unit KFHA Locking by spring force / hydraulic releasing TI-F60-EN-01/2018 Purpose The Locking Unit KFHA clamps a shaft in any position. It is commonly used to clamp the rod of standard cylinders according to ISO 6020-2 (160 bar) or other shafts independent from the cylinder. It holds axial forces in both directions. Mounting to a cylinder The Locking Unit KFHA is prepared to be mounted on a cylinder according to ISO 6020-2. It is compatible to the different mounting possibilities listed below. In each case the Locking Unit KFHA itself is to be mounted on...

Mounting without a cylinder Mounting the Locking Unit KFHA in applications without cylinder / centering ring C Mount in this way if the Locking Unit KFHA shall be used on a separate rod. This type of mounting is only admissible in combination with the centering ring which has to be ordered together with the unit. The support surface on the machine element must face the centering ring side of the Locking Unit KFHA. Axial play The load is held free from axial play in load direction 1. In standard designs, the load is also free from axial play in load direction 2 as long as the load does not exceed...

Technical Data Sheet SITEMA - Locking Unit KFHA Locking by spring force / hydraulic releasing TI-F60-EN-01/2018 Pressure fluid Emergency releasing Hydraulic oil (HLP) in accordance with DIN 51524-2:2006 must be used as pressure fluid. Please consult SITEMA before using any other fluids. In case the hydraulic releasing should not work, a mechanical emergency releasing is possible. This method is only admissible for emergency cases and not suitable for repeated use. Control In most applications, an actuation as suggested in the drawing below is used. During every operational cycle, the 3/2-way...