Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X50-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X50-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm bore and 50mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke50 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 MAJ40X50-40S
A 40 mm stainless round barrel, a 16 mm hard-chrome plated rod and an external stop screw that trims the extend stroke anywhere inside the ordered 40 mm window: the MAJ40X50-40S is the strongest bore in the AirTAC MA mini series, pushing 628 N at 0.5 MPa and 880 N at 0.7 MPa. Double-acting air drives both directions and the rolling-packed body keeps the envelope tight.
Unlike painted-steel minis, the riveted stainless tube and aluminium covers tolerate damp jigs and wash-adjacent stations without flaking. Plan on about 377 N of usable push at 0.5 MPa so the cylinder never sits at its ceiling. Fixed anti-impact pads soften stroke-end contact, and the standard built-in magnet accepts CMSG, DMSG or EMSG switches straight from stock.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X50-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X50-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 MAJ40X50-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -40 | 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 MAJ40X50-40S Is Used
Bottle sorting gate
A 50 mm stroke gate kicks misaligned 500 ml bottles off a beverage line; the -40 window lets technicians dial in the exact gate throw without swapping cylinders.
Fixture clamp on a CNC mill
Clamping aluminium brackets at roughly 377 N of working force, with the extend stroke trimmed to match each fixture height.
Small die ejector
Short ejection of pressed terminals from a stamping die, where the 16 mm rod and 628 N push clear parts in one stroke.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X50-40S the Right Cylinder?
Compare both directions: bore 32 gives 402 N at 0.5 MPa and suits loads under roughly 240 N, while this 40 mm bore is the largest in the MA range, so jobs needing more than 628 N belong on the cushioned MACJ family. Remember the stop screw is a mechanical end stop: it sets where the rod stops extending but will not lock it against drift when air pressure drops. Mount with FA flange or LB foot and add I or Y rod knuckles where the load pivots; air connects through a 1/8" port.
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 MAJ40X50-40S FAQ
At 0.5 MPa the cylinder pushes 628.3 N and pulls 527.8 N; at 0.7 MPa those climb to 879.6 N push and 738.9 N pull. Theoretical maximum at 1.0 MPa is 128.1 kgf. Supply 0.15-1.0 MPa (22-145 psi), rod speed 30-800 mm/s.
No. Every MAJ ships with the magnet built in as standard, so AirTAC CMSG, DMSG and EMSG switches clamp onto the barrel and read position immediately.
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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