01
Design + Material Selection
Customer spec → engineering design + material + tolerance definition. Engineered to customer specification, working with all material types.
HPS production flow
Production from cutting to packing
Cutting, CNC machining, welding, assembly, pressure testing and painting are done at our plant. Telescopic stage tubes are hard-chrome plated on our own line, with approved platers for extra capacity.
Materials
Materials used in our cylinders
Unless your drawing states otherwise, the materials below apply.
02
Barrel
Honed tube, EN 10305-1 E355, bore tolerance H8 or H9, as agreed.
03
Piston rod
C45E (Ck45) or 42CrMo4; hard chrome min. 20 µm per side (40 µm on the diameter), typically 30 µm per side.
04
Seals + Fittings
NBR / PU / FKM / PTFE seal set, gland, port and end-mount components, selected per application.
HPS in-house production
Five-stage in-house production process
Cutting, CNC machining, welding, assembly and pressure testing are done at our plant. Every cylinder is tested before dispatch.
01
Cutting
Tube and bar are cut to length on automatic cutting machines or a circular saw.
Barrel: honed tube, EN 10305-1 E355; piston rod: C45E (Ck45) or 42CrMo4.
02
CNC Machining
Turning, milling, drilling: machining of rod + body + head + cap parts. Precision chip removal on calibrated machines.
Heads, caps and rods are machined on CNC lathes, other parts on vertical machining centres.
03
Welding
Parts are joined by synergic MIG welding on a rotating positioner.
Caps and other welded parts are weldable St52.
04
Assembly
Seal set (NBR / PU / FKM / PTFE) + piston + rod + gland + body final assembly.
The seal set is selected by application: pressure + temperature + fluid type.
05
Pressure Test
Pressure, internal and external leakage, function and dimensions are checked on the test bench; test pressure to drawing, otherwise 1.5 × nominal pressure (ISO 10100).
Every cylinder is tested before dispatch; a test record is available on request.
Stage tube plating
Chrome plating of telescopic cylinder stage tubes
The outer surface of every stage tube of a telescopic cylinder must be hard chrome plated for friction + sealing.
Stage tubes are hard-chrome plated on our own line, with approved platers for extra capacity.
Number of stages
2-7 stages
Tube raw material
EN 10305-1 E355
Plating type
Hard chrome, typically 30 µm per side, min. 20 µm
Production process detail
For a specific production stage, quality control procedure or a facility visit, book an appointment with our engineering team.
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