F55 Dimensions, type KFHS (DGUV certified)
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SITEMA Locking Units KFHS Locking by spring force / hydraulic releasing English translation of German original Technical Data Sheet TI-F55 Locking Units series KFHS (with dguv approval) For a detailed functional description refer to“Technical Information TI-F10". Further important practical advice is given in “Operating Manual BA-F55". Technical Data Sheet SiTEMA ■ Expertise in Safety © Pressure port L “release” see 0 © Pressure port LL alternative to L see 0 ©Port T “pressure compensation” see 0 © Holder for proximity switch 1, signal “load secured” see 0 © Holder for proximity switch 2, signal “clamping released” see 0 Due to tolerances, ports 1, 2 and T may be displaced up to +/-5° relative to pressure port L as well as the threaded holes G2 to pressure ports L/LL and ports T. Fig. 1: Dimensions Locking Unit KFHS (download CAD files from www.sitema.com) Subject to modification without prior notice o M is the admissible force the mass to be secured exerts on the Locking Unit KFHS. The holding (braking) force for dry or hydraulic-oil wetted rods is not less than 2 x M but will not exceed 4 x M. 0 The pressure p is required to release the clamping. The admissible operating pressure is 160 bar. 0 As supplied, pressure port LL is plugged by a plug screw. It may be used alternatively to pressure port L and is useful for filling / air-bleeding. We recommend connecting an auto-bleeder to the port which is not in use (not supplied in scope of delivery; available as option - see “Technical Information TI-Z10”). o Hydraulic operating volume 0 Proximity switch holders are provided for standard inductive proximity switches (M 12 x 1 nominal switching distance 2 mm, flush mountable, NOC), except KFHS 18 and KFHS 25: M 8 x 1 with a nominal switching distance of 1.5 mm. For easier service, the proximity switch holders have a depth stop and are pre-adjusted when delivered from the factory. The switches only need to be inserted to the stop and then clamped. The proximity switches are not supplied in the standard scope of delivery, but are available as accessories. o Internal volume changes during switching are compensated at ports T. An air filter is fitted to one of the ports T for “breathing”. The other port T is closed by a plug screw. In a dry and clean factory environment, this offers sufficient protection against dust etc. If, however, moisture or aggressive media are present, a pressureless hose instead of the filter must be installed to connect the Locking Unit KFHS with clean atmosphere (e.g. a clean pressureless container). The other port T must be sealed with a plug screw. 7 Spacers keep the Locking Unit released and need to be removed after installation. SITEMA GmbH & Co. KG . G.-Braun-StraUe 13 . D-76187 Karlsruhe . Phone: +49(0)721/98661-0 . Fax: -11 . www.s

Technical Data Sheet TI-F55 Locking Units series KFHS (with dguv approval) For a detailed functional description refer to“Technical Information TI-F10". Further important practical advice is given in “Operating Manual BA-F55". Rod diameter 56 mm - 60 mm © Pressure port L “release” see 0 © Pressure port LL alternative to L see 0 ©Port T “pressure compensation” see 0 © Holder for proximity switch 1, signal “load secured” see 0 © Holder for proximity switch 2, signal “clamping released” see 0 Due to tolerances, ports 1,2 and T may be displaced up to +/-5° relative to drawn position as well as...

Subject to modification without prior notice O M is the admissible force the mass to be secured exerts on the Locking Unit KFHS. The holding (braking) force for dry or hydraulic-oil wetted rods is not less than 2 x M but will not exceed 4 x M. 0 The pressure p is required to release the clamping. The admissible operating pressure is 160 bar. 0 As supplied, pressure port LL is plugged by a plug screw. It may be used alternatively to pressure port L and is useful for filling / air-bleeding. We recommend connecting an auto-bleeder to the port which is not in use (not supplied in scope of...

Purpose The Locking Unit KFHS is designed to hold static loads. For this static holding, the Locking Unit KFHS is certified according to the testing principle GS-HSM-02 of the DGUV (see pages 6-9). Axial play The admissible load (M) is held free from axial play in load direction 1 and 2. Operating conditions The Locking Unit KFHS is designed to operate in normal clean and dry workshop atmosphere. Operation in other environmental conditions is possible if at least port T is connected to a clean and dry atmosphere (e.g. tank). In case of heavy soiling conditions (grinding dust, chips, other...

Technical Data Sheet SITEMA Locking Units KFHS Locking by spring force / hydraulic releasing TI-F55-EN-01/2016 Load secured independently from the Locking Unit Secure load otherwise Locking Unit Energize valve Fault indication Fig. 4: Schematic diagram of hydraulic circuit * In case impact noises due to excess pressure are audible when pressurizing the Locking Unit KFHS, these can be suppressed by means of a flow control valve in the p-line. ** In case the pressure is not sufficiently constant (e.g. pressure drop at the beginning of a downward stroke), we recommend a check valve in the...

Approval of SITEMA Locking Units KFHS for use as mechanical restraint devices in hydraulic presses The European Standard DIN EN 693 Machine tools - Safety - Hydraulic presses ascertains the following facts: "On presses with an opening stroke length of more than 500 mm and a depth of table of more than 800 mm, the [restraint] device shall be permanently fixed and integrated with the press.” The following document approves that SITEMA Locking Units KFHS can be used as a mechanical restraint device (German: Hochhalteeinrichtung) in this sense. Certificate number: HSM 14 037 for Locking Units...