01
Design + Material Selection
Customer spec → engineering design + material + tolerance definition. Custom-engineered to customer specification, working with all material types.
HPS production flow
Production flow from raw material to pressure test
Certified raw materials (honed precision tube + chrome-plated rod) are sourced; CNC machining, MIG/TIG welding, assembly and pressure testing are carried out in-house at HPS. Telescopic stage tubes are chrome plated on our own in-house line.
Certified raw material
Sourced certified material
Honed precision tube and hard-chrome-plated rod are sourced from certified suppliers with an EN 10204 3.1 certificate. Calibrated incoming material is the solid foundation of production.
02
Honed Precision Tube
DIN 2391 ST52 / EN 10305-1 E355 cold-drawn seamless honed tube: H8 tolerance, cross-hatch surface, certified supply (EN 10204 3.1).
03
Hard Chrome Plated Rod
CK45 / 42CrMo4 hard chrome plated rod: ~30 µm typical plating, certified supply (EN 10204 3.1).
04
Seals + Fittings
NBR / PU / Viton / 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, MIG/TIG welding, assembly and pressure testing: all in-house at HPS, under one roof. Full traceability + 100% pre-shipment pressure test.
01
Raw Material Cutting
Band saw: tube, rod, plate cutting. EN 10204 3.1 certified supplier acceptance test.
Honed precision tube is sourced certified as DIN 2391 ST52 (BKS), calibrated incoming material.
02
CNC Machining
Turning, milling, drilling: machining of rod + body + head + cap parts. Precision chip removal on calibrated machines.
The certified hard chrome plated rod is precision turned; body, head and cap parts are CNC machined.
03
MIG / TIG Welding
Body + head + cap + port + flange welding operations · certified welder.
Pressure-vessel quality seam · compliance with ISO 4413 safety requirements.
04
Assembly
Seal set (NBR / PU / Viton / PTFE) + piston + rod + gland + body final assembly.
The seal set is selected by application: pressure + temperature + fluid type.
05
Pressure Test
ISO 10100 acceptance test: 1.5× nominal pressure, sealing + static strength.
Every cylinder is tested before shipment. A test report is provided on request.
HPS dedicated line
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. Unlike a standard cylinder rod, the stage tube cannot be procured as a certified supply. It is custom-sized and application-based.
To meet this special need, HPS operates a dedicated hard chrome plating line in-house. No subcontracting lead time, quality control stays with us.
Number of stages
2-6 stages
Tube raw material
DIN 2391-2 ST52 / EN 10305-1 E355
Plating type
Hard chrome ~30 µm typical
Process
In-house, no subcontracting
Production process detail
For a specific production stage, quality control procedure or a facility visit, book an appointment with our engineering team.
Contact