Airtac MA Stainless Steel Mini Air Cylinder MA40X250-S-CA
The AirTAC Airtac MA Stainless Steel Mini Air Cylinder MA40X250-S-CA is a genuine double acting standard round-body mini air cylinder with a Ø40mm bore and 250mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionFixed anti-impact bumper pads
About the Airtac MA Stainless Steel Mini Air Cylinder MA40X250-S-CA
The largest bore in the MA family, this 40 mm cylinder delivers a 628.3 N push and a 527.8 N pull at 0.5 MPa over a 250 mm stroke, with a theoretical ceiling of 128.1 kgf at 1.0 MPa. For real machinery, budget roughly 377 N of usable work at 0.5 MPa and you keep a comfortable reserve; vertically the rod can lift about 64 kg outright, or around 32 kg once you apply a 2:1 safety margin. Air drives the piston both ways, and fixed anti-impact bumper pads soften each stroke end. The 40 mm barrel is stainless steel riveted directly to aluminium-alloy covers, so the body shrugs off washdown and damp plants far better than painted-steel minis. The 16 mm carbon-steel rod carries a 20 um hard-chrome plating against wear and mild corrosion. Ports are 1/8 in and the rod thread is M12x1.25; speed runs 30-800 mm/s across 0.15-1.0 MPa (22-145 psi). A magnet is built in as standard, so CMSG, DMSG or EMSG switches mount straight onto the barrel with no special-order piston.
Airtac MA Stainless Steel Mini Air Cylinder MA40X250-S-CA Technical Specifications
| Model | Airtac MA Stainless Steel Mini Air Cylinder MA40X250-S-CA |
|---|---|
| Series | MA mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| 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 | Fixed anti-impact bumper pads |
| 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 MA Stainless Steel Mini Air Cylinder MA40X250-S-CA
| MA | Standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
| CA / U / CM | Back-cover type: CA pivot, U flat-end, CM round-end. |
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 MA Stainless Steel Mini Air Cylinder MA40X250-S-CA Is Used
Case pusher on a corrugated box line
Mounted with an LB foot bracket, the 628 N push at 0.5 MPa slides a stacked layer of cartons sideways onto a takeaway conveyor in one 250 mm sweep.
Dairy crate rinse-station lift
In washdown areas the stainless barrel and chrome rod resist caustic splash while lifting about 32 kg crates vertically with a 2:1 margin.
Pallet-stopper gate at a loading dock
The CA pivot back cover lets the cylinder swing with a roller-lever gate that rises into the pallet path each cycle, bumped soft at both stroke ends.
Is the Airtac MA Stainless Steel Mini Air Cylinder MA40X250-S-CA the Right Cylinder?
Compare thrust before you commit: the 32 mm bore pushes only 402.2 N at 0.5 MPa, so if your load sits near 350-400 N this 40 mm unit at 628.3 N gives you headroom without jumping chassis size. When 628 N is still short, step up to the MAC series, which adds 50 and 63 mm bores and adjustable air cushions on top. Remember a plain MA drifts freely the moment air pressure drops or the valve centres, so hang a pilot check valve or rod lock on the port side if the load must stay put. The CA pivot back cover swings on a pin and pairs naturally with an I or Y rod knuckle for rotating motion; bolt on an FA flange, LB foot or SDB pivot bracket when the frame needs a fixed anchor. At 250 mm of stroke the 16 mm rod will bend under off-axis force, so carry side loads on external linear guides rather than the rod itself.
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 Bumper models: keep speed within the rated range.
- check Installation by qualified personnel per AirTAC docs.
Airtac MA Stainless Steel Mini Air Cylinder MA40X250-S-CA FAQ
At 0.5 MPa the 40 mm bore pushes 628.3 N and pulls 527.8 N; at 0.7 MPa push reaches 879.6 N. The theoretical maximum is 128.1 kgf at 1.0 MPa. Air ports are 1/8 in, the 16 mm rod thread is M12x1.25, stroke is 250 mm (within the 500 mm standard range), and working pressure spans 0.15-1.0 MPa (22-145 psi).
No. The MA carries fixed anti-impact bumper pads that simply decelerate the piston as it reaches each end, absorbing some of the impact at typical 30-800 mm/s speeds. They cannot be tuned. If your machine needs adjustable air cushioning, move to the MAC family, which offers that feature in 50 and 63 mm bores as well.
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