Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X15-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X15-20S is a genuine double acting, adjustable stroke + cushion 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. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ40 mm
- Stroke15 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
- 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X15-20S
A 40 mm stainless mini cylinder with one of the widest trim windows you can order at this stroke: the MACJ40X15-20S is double-acting, 15 mm travel, and the extend stroke can be cut back by as much as 20 mm on the machine. Air cushions at both ends are variable, so end-of-stroke impact stays tame even on faster cycles. The barrel is stainless steel, the rod hard-chrome plated carbon steel, and covers are aluminium - a riveted round body built to survive humid and food-adjacent areas.
Force at 0.5 MPa (73 psi) is 628 N push and 528 N pull, which in day-to-day sizing means around 377 N of reliable working push - about a 32 kg vertical lift with a 2:1 margin. Pressure range 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s. The piston magnet is included as standard for CMSG/DMSG/EMSG switch sensing. Remember the adjuster only shortens the stroke to a stop; it cannot hold a load in place when air is lost.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X15-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X15-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| 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 | Variable air cushion, both ends |
| 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X15-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X15-20S Is Used
Carton flap tuck
Folds a trailing flap on small cosmetic cartons; the 20 mm window absorbs flap-thickness variation between SKUs.
Sample slide advance
Advances a slide into the imaging position on a lab analyzer, where the stainless barrel handles cleaning chemicals.
Sprue nib break-off
Breaks a sprue nib on small molded parts with a 15 mm jab, cushioned so the fixture does not ring.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X15-20S the Right Cylinder?
Sizing check: a 32 mm bore gives 402 N at 0.5 MPa while a 50 mm bore reaches 981 N, so the 40 mm MACJ (628 N) suits loads in between. With a 20 mm trim window on a 15 mm stroke, the extend stop can be set anywhere across most of the travel - useful where stroke length is tuned per product changeover. Choose FA flange or LB foot mounting; I and Y knuckles cover rod-end links. Do not use the adjuster to hold position - on air loss the rod still moves.
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 On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X15-20S FAQ
At 0.5 MPa the bore delivers 628 N push and 528 N pull, rising to 880 N and 739 N at 0.7 MPa; the ceiling is 128 kgf theoretical at 1.0 MPa. Working band is 0.15-1.0 MPa (22-145 psi) and 30-800 mm/s, with a 20 mm adjustable extend window.
Yes, and nothing extra has to be ordered: the piston magnet is fitted as standard on every MA cylinder, so CMSG, DMSG or EMSG switches mount directly on the barrel for end-of-stroke signalling.
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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