Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X50-50S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X50-50S 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 MAJ40X50-50S
With a -50 window on a 50 mm stroke, this MAJ40X50-50S hands the fitter complete authority over the extend position: the external stop screw shortens the stroke by any amount within that range, on the machine, with a wrench. Force class is the top of the MA mini line, 628 N push and 528 N pull at 0.5 MPa, on a 16 mm hard-chrome rod inside a stainless barrel.
In vertical work the same 0.5 MPa push equates to about 64 kgf, so with a 2:1 margin this bore lifts roughly 32 kg of real part weight. The riveted round body stays compact on crowded benches, fixed bumper pads absorb end-of-stroke shock, and FA or LB mounting plus I and Y rod knuckles adapt to most frames.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X50-50S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X50-50S |
|---|---|
| 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 MAJ40X50-50S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -50 | 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 MAJ40X50-50S Is Used
Fill-height stop on a filling bench
On a semi-auto liquid filler, the -50 window lets an operator trim the stop so each bottle crest sits level, batch after batch.
Bench riveter crimp head
A crimp head driven across 50 mm, with the final approach shortened on site so the rivet bottoms out consistently.
Bushing seating pusher
Pressing nylon bushings into pump housings at a hand-fed fixture, where about 377 N of working force seats the part without damage.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X50-50S the Right Cylinder?
Step sizing: bore 32 tops out at 402 N at 0.5 MPa, so pick it for lighter clamps, while this 40 mm bore is the ceiling of the MA series and heavier jobs belong on MACJ. For load arrest fit a valve or an external stop, because the adjuster only sets the extend position and the rod will sag if supply air is lost. The built-in magnet pairs with CMSG / DMSG / EMSG switches for end-of-travel signals, and the 1/8" port suits common fittings.
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 MAJ40X50-50S FAQ
Expect 628.3 N forward and 527.8 N back at 0.5 MPa. Raise the pressure to 0.7 MPa and the figures become 879.6 N forward and 738.9 N back. Peak theoretical force at 1.0 MPa is 128.1 kgf, with pressure limits of 0.15-1.0 MPa (22-145 psi) and speeds from 30 to 800 mm/s.
The -50 stop screw is a mechanical limit for the extend stroke, not a mid-stroke lock or brake, so a lost air supply lets the piston drift with the load. Where holding matters, add a locking valve or an independent mechanical stop.
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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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