Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X400-50S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X400-50S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm bore and 400mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke400 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 MAJ40X400-50S
The widest trim window in this size: with a -50 suffix, the 400 mm extend stroke of this bore 40 MAJ can be pulled back by up to 50 mm after installation, so one cylinder covers several jig variants. Air works the rod in both directions - fully double acting - and fixed bumper pads soften the ends.
Output tops the MA mini series at 628 N push and 528 N pull at 0.5 MPa, rising to 880 N on extension at 0.7 MPa. Keep continuous loads near 377 N, or think of it as a vertical lift of about 32 kg at a 2:1 margin. The rolled stainless barrel with its hard-chrome rod handles humid, washed-down corners that eat painted minis, while the standard magnet lets CMSG / DMSG / EMSG switches sense position anywhere on the tube.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X400-50S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X400-50S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 MAJ40X400-50S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 MAJ40X400-50S Is Used
AGV dock pusher
Nudging pallets from an AGV onto a gravity roller lane; 628 N at 0.5 MPa moves a loaded 200 kg pallet on rollers with margin to spare.
Changeover end stop
Repositioning the product stop between SKUs on a wraparound labeller; the 50 mm window spans the whole size range with one cylinder.
Case diverter
Kicking cases from a main conveyor into a sortation lane; bumper pads keep the diverter quiet through 800 mm/s cycling.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X400-50S the Right Cylinder?
Below roughly 240 N of working load a bore 32 unit (402 N at 0.5 MPa) will do the same job smaller; above 628 N you are outside the MA range. Fit FA flange or LB foot mounts, with I or Y knuckles for pivoting links. A 400 mm stroke wants external guidance for the load - never lean sideways on the Dia 16 rod. If the machine must hold position through an air drop, add a separate clamp or stop, because the trim screw only defines the extend limit.
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 MAJ40X400-50S FAQ
Expect 628.3 N forward and 527.8 N return at 0.5 MPa; at 0.7 MPa, 879.6 N forward and 738.9 N return; theoretical maximum 128.1 kgf at 1.0 MPa. Stroke speed 30-800 mm/s, media air filtered to 40 um, temperatures -20 to +70 C, and the 1/8" port takes PT, G or NPT threads.
FA flange and LB foot are the standard mounts, and I or Y rod knuckles suit pivoting links - this adjustable version has no SDB option or back-cover code. For heavy side guidance over the 400 mm travel, fit external linear guides rather than loading the rod itself.
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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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