M/1525
Cylinder with fixed-range positioner (Ø 2½ in)
info@nortrade.si | +386 4 531 75 50
info@nortrade.si | +386 4 531 75 50
The Martonair Classic family is Norgren's proven heritage cylinder range — designs that have been in industrial service for decades and remain the right choice for legacy machine retrofits, imperial-sized installations, and specialist applications like impact pressing. Five ranges across four series: the M/1525 / M/1540 fixed-range positioner — a servo-style cylinder that sets piston position steplessly in proportion to a 0.2-1 bar control signal, without an external positioning valve; the M/3000 Impact Cylinder delivering 24-253 J for marking, piercing and light press work; the M/6000 round-line in compact Ø 10-25 mm sizes; and the RM/900 imperial tie-rod cylinder (Ø 1¼ to 14 inch) for traditional heavy-industry installations.
Cylinder with fixed-range positioner (Ø 2½ in)
Cylinder with fixed-range positioner (Ø 4 in)
Impact cylinder, double acting
Classic Roundline cylinder, double acting
Traditional imperial tie-rod cylinder, double acting
Three reasons. Imperial sizing: legacy machinery built to inch dimensions can't drop in a metric ISO cylinder without redesigning the mounting. Specialised function: the M/3000 Impact and M/1525/40 Positioner do specific jobs that don't have direct profile-cylinder equivalents. Cost: for low-spec applications, classic Martonair is often cheaper than a modern ISOLineRA/802000.
Yes — it's a current production part because there's no modern equivalent for light press work without a hydraulic system. 24.5-253 J at 5.5 bar covers light marking, piercing thin sheet, and similar operations where a hydraulic press is overkill. Four sub-models M/3020 – M/3060 (Ø 2-6 inch); operating pressure 2.7-10 bar (Ø 2-4 inch) / 2-10 bar (Ø 6 inch); -20 to +80 °C. Vertical mounting is mandatory for proper operation.
RM/900 is imperial-bore (Ø 1¼-14 inch) tie-rod construction, anodised aluminium or steel barrel, traditional design. RM/8000 (under Roundline) is metric ISO 6432 (Ø 10-25 mm) round-line, stainless steel barrel. They serve completely different markets — RM/900 for legacy/imperial, RM/8000 for modern metric installations. Don't confuse the two when reading old drawings.
