Airtac MARU Stainless Steel Mini Cylinder MARU40X85S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU40X85S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø40mm bore and 85mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ40 mm
- Stroke85 mm
- Port size1/8"
- Acting typeDouble acting + cushion (up mount)
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
About the Airtac MARU Stainless Steel Mini Cylinder MARU40X85S
An 85 mm stroke gives the MARU40X85S a little extra reach inside a 40 mm bore. The cylinder is double acting with a variable air cushion at both ends, and the up-mount bracket is riveted into the body, so no separate flange or foot is ordered. At 0.5 MPa the piston delivers 628 N of push and 528 N of pull, rising to 880 N of push at 0.7 MPa.
Construction is a stainless round barrel packed onto aluminium covers with a 16 mm hard-chrome rod, a body type that outlasts painted housings near coolant mist or outdoor wash points. Run it anywhere from 30 to 800 mm/s and trim the cushion needles on first start-up to kill end-of-stroke bang. Because the magnet is standard on every MA-series piston, DMSG sensors drop straight on for end-position checking. For sizing, treat about 377 N as the working push at 0.5 MPa - a vertical lift near 32 kg with a 2:1 margin.
Airtac MARU Stainless Steel Mini Cylinder MARU40X85S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU40X85S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 85 mm |
| Acting type | Double acting + cushion (up mount) |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MA-series datasheet. Barrel: stainless-steel tube (round-body, riveted rolling-packed construction); piston rod: carbon steel with 20µm hard-chrome plating; covers: aluminium alloy. Thread options: PT (blank) / G / NPT. Every MA-series cylinder ships with a built-in magnet for CMSG / DMSG / EMSG position sensors.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MARU Stainless Steel Mini Cylinder MARU40X85S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| U | Front-cover mount: U = up (top) mounting. |
| 40 | Bore size in mm. |
| ×85 | Stroke length in mm. |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
MA-family variants: MA / MAC (double acting ±cushion), MSA / MTA (single acting push / pull), MAD / MACD (double rod ±cushion), MAJ / MACJ (adjustable stroke ±cushion), MAR (cushioned with integrated F/U mount). Mounting accessories: FA flange, LB foot, SDB pivot; plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MARU Stainless Steel Mini Cylinder MARU40X85S Is Used
Rotary index lock pin
The 85 mm stroke pulls a locking pin clear of a rotary index table between stations, with DMSG sensors confirming the home position.
Glue head retraction
Lifts a glue or sealant applicator head clear of the part after each bead, cycling fast without hammering the covers.
Pallet ratchet lever
Drives the release lever on a manual pallet ratchet or drum clamp where the integral top mount bolts straight to the handle frame.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU40X85S the Right Cylinder?
Sizing by force, drop to a 32 mm bore for 402 N at 0.5 MPa or rise to a 50 mm bore when you need 981 N; the 40 mm choice here splits the difference at 628 N. Note that the MAR does not hold position on air loss - the piston simply drifts, so a rod lock is the fix where holding matters. With the bracket already on the cylinder and the magnet fitted as standard, one order covers both mount and position sensing.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) is standard for sensors
- ✓ Back cover (CA/U/CM) & mount (FA/LB/SDB)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MARU Stainless Steel Mini Cylinder MARU40X85S FAQ
Push at 0.5 MPa is 628 N and pull 528 N; at 0.7 MPa push reaches 880 N, and the theoretical ceiling at 1.0 MPa is 128 kgf. Air supply can run from 0.15-1.0 MPa (22-145 psi) with 1.5 MPa (215 psi) proof pressure.
A magnet is standard in the piston, so CMSG, DMSG or EMSG switches mount on the barrel without any special order. The air cushion at both ends is variable - turn the needle screws on first run so fast strokes do not hammer the covers.
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