
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X50-10S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø50mm bore and 50mm 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.
A riveted round body, not a tie-rod stack: the MACJ50X50-10S pairs a stainless-steel barrel with a hard-chrome plated carbon-steel rod and rolled aluminium-alloy covers, so damp washdown corners and outdoor panels do not chew it up the way painted minis suffer. Double-acting with variable air cushions at both ends, it trims the extend stroke anywhere within a 10 mm window using the built-in stop screw.
At 0.5 MPa the 50 mm piston pushes 981.3 N, which means roughly 589 N of usable work once you keep a sensible margin - enough to seat or date-stamp carton lids all day. A built-in magnet is standard, so CMSG, DMSG or EMSG switches clip straight on, and the dual cushions let you run up to 800 mm/s without hammering the covers.
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X50-10S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 50 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. |
| ×50 | Stroke length in mm. |
| -10 | 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.
Short, crisp presses over the 10 mm trim window suit ink or embossing heads that must sit at a repeatable height on a dairy carton line.
Drill-jig and swing clamps on small machining fixtures get 981 N of clamp force with the stop set to the part height.
With a CMSG switch clipped to the standard magnet, the cylinder confirms a bracket is seated before the next press cycle starts.
Compare bores at 0.5 MPa push: a MACJ40 delivers 628.3 N and a MACJ63 reaches 1557.9 N, so the 50 mm at 981.3 N sits mid-range for clamps and short presses. Keep real loads near 589 N in service. The stop screw is a mechanical end stop only - it sets the extend position but does not lock the piston against drift when air is lost, so add a locking valve if holding matters.
Mount with an FA flange or LB foot and pair with I or Y rod knuckles if the load pivots (the adjustable version has no SDB option). At this 50 mm stroke side-load is rarely an issue, but keep the rod square to the load anyway; ports are 1/4" (PT as standard, G or NPT on request) and the male rod thread is M14x1.5.
Quick checklist
At 0.5 MPa it pushes 981.3 N and pulls 880.8 N; at 0.7 MPa those figures rise to 1373.8 N and 1233.1 N. The theoretical maximum is 200.1 kgf at 1.0 MPa. Keep practical loads near 589 N for long seal life, and remember the 10 mm stop screw only sets the extend position - it does not lock the piston.
The barrel is stainless steel with a hard-chrome plated carbon-steel rod and riveted aluminium covers, so mild washdown, humidity and outdoor exposure are far less damaging than on painted-steel minis. Air supply is 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, and both ends carry a variable air cushion.
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