WARNING
Danger in the event of severe dirt contamination, and when lubri-
cants or releasing agents are present at the operating location!
Penetration of foreign bodies (grinding dust, swarf), lubricants or liquids (espe-
cially coolants, preservatives and releasing agents) into the housing might re-
sult in loss of holding force.
Ü
Connect a depressurized line to port T, routed to a clean environment
(such as a clean, depressurized vessel).
Ü
Protect the rod against contact with foreign bodies, lubricants or liquids,
such as by installing a bellows.
If in doubt, please contact SITEMA. We will be glad to help.
6.2 Requirements for the clamping rod
WARNING
Danger if an incorrect clamping rod is used!
Selection of the wrong clamping rod might result in danger.
Ü
Select the clamping rod in accordance with the specification.
Ü
Provide protection against corrosion without use of high-viscosity lubri-
cants (grease).
Ü
Make sure the base material is of adequate strength.
Ü
Make sure the rod will not bend under pressure.
Ü
Configure the mounting elements to handle the maximum holding force.
The clamping rod must have the following properties:
• ISO tolerance zone: f7 or h6
• induction hardened min. HRC 56,
surface hardening depth: up to ø 30 mm: min. 1 mm,
ø over 30 mm: min. 1.5 mm
• surface roughness: Rz = 1 to 4 μm
• protection against corrosion, e.g. hard chromium plating: 20 ±10 μm,
800 – 1000 HV
• lead-in chamfer, rounded: min. 4 x 30 °
For example, standard rods with this specification can be used:
1. Piston rods (ISO tolerance field f7), hard chrome plated
• base material: yield strength min. 580 N/mm²
• induction hardened HRC 56 – 64,
surface hardening depth min. 1 mm or 1.5 mm
• hard chrome plating: 800 – 1100 HV, min. depth 13 μm
• surface roughness: Ra 0.15 – 0.25 μm
2. Rods for linear ball bearings (ISO tolerance field h6)
• induction hardened min. HRC 60,
surface hardening depth min. 1 mm or 1.5 mm
• surface roughness: Ra 0.15 – 0.25 μm
Operating Manual
Safety Locks series KRGP
Pneumatic / compressive load
Original instructions BA-S12-en-1-15
© SITEMA GmbH & Co. KG . G.-Braun-Straße 13 . 76187 Karlsruhe (Germany) . Phone: +49(0)721/98661-0 . Fax: -11 . www.sitema.com
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