RM/8000/M
ISO 6432 cylinder, double acting
info@nortrade.hu | +36 1 421 4032
info@nortrade.hu | +36 1 421 4032
Round-line cylinders are the simplest and most space-efficient pneumatic cylinder format — circular cross-section, no profile groove, no tie-rods. Norgren's roundline range covers Ø 8 to 100 mm in three families: ISO 6432 (RM/28000, RM/8000, TRM/8000) for ISO-spec installations Ø 10-25 mm; classic Roundline (RT/57100, RT/57200, RT/57300) that saves 20% installed length vs. equivalent ISO/VDMA in Ø 8-63 mm; and threaded-barrel Roundline (RM/55401) for Ø 32-100 mm clean-line industrial installations. Magnetic piston versions, ATEX zone 1 & 2 (gas) variant available.
ISO 6432 cylinder, double acting
ISO 6432 cylinder, single acting
ISO 6432 cylinder, double acting (ATEX certified)
ISO 6432 cylinder, double acting (high temperature, +150 °C max.)
Roundline cylinder, single acting (spring return)
Roundline cylinder, double acting
Roundline cylinder, single acting (spring extend)
Roundline cylinder, double acting
RM/8000 is built to ISO 6432 — the dimensional standard for small-bore round cylinders. Pick this when the application calls for ISO 6432 compatibility (Festo DSNU, SMC C85 direct replacement). RT/57100/200/300 is Norgren's classic Roundline family, 20% shorter than equivalent ISO/VDMA, but does not match the ISO 6432 dimensional spec — the dimensions are Norgren-proprietary. Pick RT/57x00 when installed length matters more than ISO compatibility.
Wetted parts — barrel, piston rod — are stainless steel as standard on most variants (RM/8000, RT/57x00). End covers are aluminium (clear-anodised on RM/8000 and RM/55401; plain aluminium on RT/57x00) — not stainless. So they're partially stainless — corrosion-resistant in normal industrial environments and most light-marine/food installations, but not fully stainless for aggressive media or strict food contact (use the dedicated KM/8000 / KA/802000 stainless ISO Roundline / ISOLine families for that).
Yes — Norgren round-line cylinders with magnetic piston (/M suffix) are compatible with M/50 switches via the strap-mount bracket (QM/33 series) delivered with the switch. The strap clamps around the round barrel at the desired axial position. Not flush-mount like profile cylinders — the switch sits on the outside of the barrel — but reliable and infinitely positionable along the stroke.
Buffer cushioning is a PUR elastomer pad in the end cap — fixed energy absorption, suitable for light loads and moderate speeds (standard on RM/28000 and the RT/57x00 family). Adjustable cushioning uses a screw-controlled air bleed that decelerates the piston near end-of-stroke — the deceleration curve can be tuned to actual load and velocity (required for heavier loads or higher speeds). On the RM/8000 family adjustable cushioning is only available on Ø 16, 20, 25 mm (Ø 10 and 12 are buffer-only). The RM/55401 family is supplied with adjustable cushioning as standard across the full Ø 32-100 mm range.
The RM/55401/W2 uses special piston/rod seals and wiper designed to resist heavily contaminated or abrasive environments. The datasheet lists the typical applications as cement, plaster (stucco), arizona sand, and hoar-frost or ice contact installations. Recommended for construction-machinery, ceramics, or cold-storage applications where standard NBR/PUR seals would wear out prematurely. The same combination with a double-ended rod is available as /W4.
