Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X15-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X15-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm bore and 15mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke15 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 MAJ40X15-20S
A 15 mm stroke that can be cut back by a full 20 mm gives this MAJ40 unusual latitude for such a short cylinder - the stop screw sets the extend position after installation, inside the ordered window. Double-acting, it pushes 628 N and pulls 528 N at 0.5 MPa; at 0.7 MPa those figures rise to 880 N and 739 N.
The stainless round barrel, riveted aluminium-alloy covers and hard-chrome 16 mm rod shrug off the moisture that wrecks painted-steel minis, and the built-in magnet means CMSG, DMSG or EMSG switches bolt on with no special-order piston. Practical numbers: expect about 377 N of genuine working push at 0.5 MPa, and allow roughly 32 kg of vertical lift once a 2:1 margin is applied to the theoretical 64 kg.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X15-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X15-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 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 MAJ40X15-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×15 | 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 MAJ40X15-20S Is Used
Carton flap tuck
Tucks leading box flaps ahead of the glue head on a cartoner; the 20 mm trim aligns the tucker horn to each carton height during changeover.
Soft-jaw fixture clamp
Clamps aluminium housings in a soft-jaw CNC fixture; 628 N of push at 0.5 MPa grips without marring, and the short stroke keeps the clamp inside the tool envelope.
Tote stop gate
Stops totes one at a time at a goods-to-person pick module release point; the trim sets gate travel to match tote width so the next tote is not clipped.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X15-20S the Right Cylinder?
Compare first: a MAJ32 at 15 mm delivers 402 N at 0.5 MPa, while this 40 mm bore - the biggest in the MA family - gives 628 N. FA flange or LB foot mounting both work at this stroke; add an I or Y knuckle when the load needs a swivel. Note the 20 mm adjustment is an extend-stroke end stop only: with air lost, the rod is free to move, so fit a separate lock if the load must stay put. At 15 mm of travel the fixed bumper pads absorb most cycle-end shock, keeping noise down in high-rate cells.
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 MAJ40X15-20S FAQ
0.5 MPa gives 628 N push and 528 N pull; 0.7 MPa gives 880 N push and 739 N pull; 1.0 MPa is the theoretical 128.1 kgf peak. Air must be filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof tested to 1.5 MPa (215 psi), with 30-800 mm/s rod speed from -20 to +70 C.
Yes - the barrel is stainless steel and the 16 mm rod is hard-chrome plated carbon steel (about 20 um of plating), a combination that handles washdown, coolant mist and outdoor exposure far better than painted-steel mini cylinders. Covers are aluminium alloy with a stainless-steel block rolled into the riveted pack.
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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