Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X150-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X150-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm bore and 150mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke150 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 MAJ40X150-20S
Twenty millimetres of on-site trim is a practical middle ground for lines re-tooled mid-shift: the MAJ40X150-20S extends under full air pressure to 150 mm, or stops anywhere inside a 20 mm window once the external screw is set. Output at 0.5 MPa is 628.3 N, rising to 879.6 N at 0.7 MPa, figures worth checking against a 32 mm bore (402.2 N) before you commit to a larger frame.
The barrel is stainless steel rolled over aluminium covers, a compact riveted package that tolerates splash in food and packing halls better than painted housings. It runs 0.15-1.0 MPa (22-145 psi) with 1.5 MPa (215 psi) proof, on 40 um filtered air between -20 and +70 C. For lift duty, 0.5 MPa output equates to roughly 64 kgf theoretical, or about 32 kg vertical with a 2:1 safety margin.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X150-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X150-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 MAJ40X150-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 MAJ40X150-20S Is Used
Carton flap tucker
Folds top flaps on a case packer, using the 20 mm window to absorb minor flap-height changes without re-tubing.
Conveyor diverter kicker
Kicks small totes onto a reject lane; 628 N of push at 0.5 MPa clears the lane in a single stroke.
Mould insert seating
Seats inserts in a bench jig before overmoulding, with 879.6 N on tap if supply is raised to 0.7 MPa.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X150-20S the Right Cylinder?
There is no larger MA bore, so 40 mm tops this family: 628.3 N push at 0.5 MPa, roughly 377 N once derated for real work. Drop to a 32 mm MA only when loads stay under about 350 N. The 20 mm window trims extend travel downward from 150 mm; it is an end stop rather than a mid-stroke lock, so handle a drifting piston under air loss with a valve, not the adjuster. FA flange, LB foot and I or Y knuckles cover the mounting map, and the standard magnet pairs with CMSG or DMSG switches out of the box.
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 MAJ40X150-20S FAQ
Push is 628.3 N and pull 527.8 N at 0.5 MPa; at 0.7 MPa expect 879.6 N and 738.9 N. The theoretical maximum is 128.1 kgf at 1.0 MPa. All figures assume 0.15-1.0 MPa (22-145 psi) supply, 1.5 MPa (215 psi) proof and 30-800 mm/s travel.
It carries fixed anti-impact bumper pads that soften contact at both ends; they decelerate but cannot be tuned. Adjustable air cushioning belongs to the MACJ family, so choose that model if you need throttleable end damping.
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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