
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X150-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø50mm bore and 150mm stroke, 1/4" 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.
On a 50 mm bore, 981 N of push at 0.5 MPa puts the MACJ50X150-40S in light-press and gate-driving territory, and its 40 mm adjuster window lets you shorten the 150 mm extend stroke to match the fixture. The double-acting piston carries a variable air cushion at each end, so you can raise speed toward 800 mm/s without hammering the covers.
Mounting is flexible: FA flange or LB foot plates plus I and Y rod knuckles suit clamp arms and linkages. The stainless round barrel resists corrosion in wet or outdoor cells where painted bodies blister, and the standard magnet means position feedback with CMSG / DMSG / EMSG switches needs no special-order piston. Budget about 589 N of usable force at 0.5 MPa for real work.
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X150-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 150 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | 1234 N |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×150 | Stroke length in mm. |
| -40 | 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.
Kicks small moldings free of a fixture; 1374 N at 0.7 MPa handles sticky parts and the 40 mm trim sets the ejection depth for shallow cavities.
Stops containers under a filler head; the stainless round body copes with syrup splash and periodic rinsing.
Folds flaps on a case packer; 981 N at 0.5 MPa pushes stiff board while the 40 mm window sets the fold depth.
If 981 N at 0.5 MPa overshoots the job, the 40 mm bore (628 N) saves air; if the clamp fights back, the 63 mm bore reaches 1558 N. The 40 mm trim is set with the external stop screw, which shortens the extend stroke only and holds nothing when air fails. Bolt it down with an FA flange or LB foot, and on this 150 mm stroke keep the tooling aligned to avoid rod bending.
Quick checklist
Push 981.3 N and pull 880.8 N at 0.5 MPa; push 1373.8 N and pull 1233.1 N at 0.7 MPa; theoretical peak 200.1 kgf at 1.0 MPa. The extend stroke is trimmed by the 40 mm adjuster, both ends have a variable air cushion, speed range is 30-800 mm/s and pressure range 0.15-1.0 MPa (22-145 psi).
FA flange and LB foot brackets are available, along with I and Y rod knuckles for linkage work. The variable air cushion at each end is tuned with the cushion screws, letting you absorb end-of-stroke shock as speed or load rises.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models are processed and dispatched in 3-5 business days.
Most inquiries answered within 7-8 hours.
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