
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X100-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø63mm bore and 100mm 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 40 mm trim window and a 100 mm base stroke put the MACJ63X100-40S in the heavy end of the AirTAC MA mini family: double-acting, with a variable air cushion at both ends to soak up shock at cycle rates up to 800 mm/s. At 0.5 MPa the 63 mm bore pushes 1557.9 N, which works out to a vertical lift equivalent of about 159 kg before any margin is applied.
Halve that for a 2:1 factor and you can lift about 79 kg of real part weight per cycle. The riveted stainless barrel and 20 um hard-chrome rod resist corrosion in damp workshops and washdown zones, and because the magnet ships as standard, CMSG / DMSG / EMSG switches drop on without a special-order piston. The stop screw shortens the extend stroke only; it is not a load-holding brake, and the piston can still drift if supply pressure is lost.
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X100-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø63 mm |
| Stroke | 100 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 | 1559 N | 1458 N |
| 0.7 MPa | 2182 N | 2041 N |
| Max (@1.0 MPa) | 318 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). |
|---|---|
| 63 | Bore size in mm. |
| ×100 | 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.
Set the extend stop through the 40 mm window to butt extrusion lengths against a gauge at the saw, letting the rear cushion absorb the butt impact.
2181.0 N of push at 0.7 MPa shears sprues on PP molding machines, with both-end cushioning sparing the covers from hammering.
Releases conveyor pallet gates in a bottling hall where washdown spray would rust a painted-steel mini cylinder within months.
Drop to the 50 mm bore and its 981.3 N push at 0.5 MPa if your working load sits under about 589 N; stay at 63 mm when you need the full 1557.9 N. The 40 mm window gives more fine-travel than the -30 version, useful where product sizes change between batches. Since 63 mm tops the MA range, there is no larger bore to step up to in this series.
Mount it FA (flange) or LB (foot), add I or Y rod knuckles if the load is not in line, and keep side loads off the 16 mm rod - the hard-chrome plating is tough but the rod is not a guide. Ports are 1/4" and the rod thread is M14x1.5.
Quick checklist
Expect 1557.9 N push and 1457.4 N pull at 0.5 MPa. At 0.7 MPa those rise to 2181.0 N push and 2040.3 N pull, and the theoretical peak is 317.7 kgf at 1.0 MPa. Pressure range is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi).
It sets how far the extend stroke can be shortened on site with the stop screw; the retract stroke stays 100 mm. A variable air cushion at each end is tuned independently, so faster speeds up to 800 mm/s or heavier loads land gently without metal-to-metal impact. The stop holds position mechanically only; it is not a brake against air loss.
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Covers non-human-caused product damage.
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