Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X500-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X500-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm bore and 500mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke500 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM12×1.25
- CushionFixed anti-impact bumper pads
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X500-20S
Trim the extend stroke anywhere within a 20 mm band on the MAJ40X500-20S, a double-acting round-body mini cylinder with a 500 mm stroke. At 0.5 MPa the 40 mm bore delivers 628 N pushing and 528 N pulling, so plan on roughly 377 N of usable work and the actuator never runs at its ceiling. Operating range is 0.15-1.0 MPa (22-145 psi) with rod speed from 30 to 800 mm/s.
A stainless barrel with a hard-chrome plated 16 mm rod shrugs off washdown mist and humid air far better than painted minis, while riveted aluminium covers keep the round body slim for tight frames. Fixed bumper pads soften the impact at each stroke end, and the built-in magnet is standard, so CMSG, DMSG or EMSG switches clip straight on without a special-order piston.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X500-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X500-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 500 mm |
| Acting type | Double acting, adjustable stroke |
| 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X500-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×500 | Stroke length in mm. |
| -20 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| -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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X500-20S Is Used
Packaging gate actuation
Slides a carton diverter gate across a 500 mm conveyor opening; the 20 mm stroke trim lets technicians dial in the exact home position without shimming the mount.
Press-bench fixture lift
With 377 N of practical push available at 0.5 MPa, it raises small welding jigs between drill stations in a job shop, staying clean under coolant mist thanks to the stainless barrel.
Washdown product pusher
Ejects trays from a dairy-line conveyor; the rolled stainless body and chrome rod handle daily hose-down that rusts or swells painted mini cylinders.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X500-20S the Right Cylinder?
At 40 mm bore this sits at the top of the MA force ladder: the MAJ32 gives 402 N push at 0.5 MPa and no larger MA bore exists, so step up to the MAC family if you need more. The 500 mm travel is right at this bore's standard maximum, and a stroke this long exposes the 16 mm rod to bending - guide the load externally rather than letting it hang side-loaded. The -20 stop screw is a mechanical extend-end stop only; if air is lost the rod still drifts, so add a separate clamping element where holding matters. FA flange or LB foot mounting, and the magnet already fitted makes position sensing a bolt-on job.
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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X500-20S FAQ
At 0.5 MPa it pushes 628 N and pulls 528 N; at 0.7 MPa push rises to 880 N. Theoretical maximum at 1.0 MPa is 128 kgf. Supply pressure runs 0.15-1.0 MPa (22-145 psi) with proof at 1.5 MPa (215 psi), and rod speed spans 30-800 mm/s.
No. Every MA-series cylinder ships with a built-in magnet as standard, so AirTAC CMSG, DMSG or EMSG reed and electronic switches mount directly on the stainless barrel for end-of-stroke or trim-position signals.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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