
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X175-10S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 175mm 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.
With just a 10 mm trim window, this MACJ turns a fixed 175 mm stroke into a fine-tunable 165-175 mm extend range, ideal when the stop position has to be dialled in on the machine. The double-acting piston runs on air in both directions and carries a variable cushion at each end, so end-of-stroke shock can be tuned out at speeds up to 800 mm/s. At 0.5 MPa it delivers 628 N on the extend stroke and 528 N retracting, topping out near 128 kgf at 1.0 MPa.
The body is AirTAC's MA round-barrel build: a stainless tube riveted to aluminium covers, with a hard-chrome plated 16 mm rod that shrugs off washdown and damp shop air far better than painted minis. A magnet is built into the piston as standard, so CMSG, DMSG or EMSG switches clip on for end-of-stroke detection without a special order.
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X175-10S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 175 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.
| 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.
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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.
A 10 mm window lets you trim the extend stop on a rotary indexing table so parts land squarely in the nest - 628 N at 0.5 MPa holds the index positive.
Gates cartons between lanes on food-line conveyors; the stainless barrel tolerates daily washdown and the cushion softens 175 mm travel at speed.
Drops a locating pin into a weld fixture; the piston lifts about 32 kg vertically with a 2:1 margin and the LB foot mounts flat on the fixture base.
Sizing: at 0.5 MPa the 40 mm bore gives 628 N push, so plan on about 377 N of real work and you keep margin for friction and pressure sag; that same margin means it lifts roughly 32 kg vertically at a 2:1 ratio. Step down to the 32 mm bore (402 N push at 0.5 MPa) for lighter clamps, or up to the 50 mm bore (981 N) for heavier pressing. The 175 mm stroke sits well inside the 500 mm standard range for bore 40. Mounting: FA flange or LB foot, plus I and Y rod knuckles. The 10 mm adjuster is a mechanical end stop, not a mid-stroke lock, so the rod can still drift if air is lost.
Quick checklist
At 0.5 MPa it pushes 628 N and pulls 528 N; at 0.7 MPa those rise to 880 N push and 739 N pull. The theoretical maximum is 128 kgf at 1.0 MPa. Working pressure is 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, and the air port is 1/8".
No. The position magnet ships inside every MA piston as standard, so CMSG, DMSG and EMSG switches mount straight onto the stainless barrel. The variable air cushion at both ends is likewise built in, letting you soften deceleration at the trimmed stop and at full retract.
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