
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X175-10S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø20mm 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.
Where a cylinder must land in exactly the same spot every cycle, the 10 mm window on this model is the tool: an external stop screw trims the 175 mm extend stroke down to 165 mm in small increments, no shimming or re-plumbing required. Double-acting bore 20 output is 157.0 N push and 131.9 N pull at 0.5 MPa. AirTAC builds the unit as a riveted round body - stainless barrel, hard-chrome plated 8 mm carbon-steel rod, aluminium covers - so it tolerates the splash and condensation found around washdown conveyors and outdoor stations.
Budget for roughly 94 N of usable force at 0.5 MPa rather than the full 157 N rating; that equates to lifting about 8 kg vertically once a 2:1 safety margin is applied. The fixed anti-impact pad decelerates the piston at stroke end - it is a bumper, not an adjustable air cushion, which belongs to the MACJ family. The magnet is standard, so CMSG / DMSG / EMSG switches mount without any option code.
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X175-10S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 175 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 | Fixed anti-impact bumper pads |
| Max standard stroke | Up to 300 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 | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | 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.
Sets the exact reach of a glue-nozzle head on a carton erecting machine; the 10 mm trim compensates for board thickness changes between SKUs.
Seats a measurement probe into machined housings at a repeatable depth, verified every cycle by a DMSG switch riding on the standard magnet.
Presses dowel pins into plastic brackets with about 94 N of usable push at 0.5 MPa - enough for small snap fits, not for heavy interference fits.
Compare before you commit: bore 16 delivers 100.5 N push at 0.5 MPa and bore 25 delivers 245.3 N, so the 157.0 N of this bore 20 sits in the middle for jigs and light clamping work. The stop screw sets the extend position but is not a mid-stroke lock - with air removed the piston still drifts, so a separate clamp or lock is needed to hold a load. Pick FA flange or LB foot mounting, bolt on an I or Y knuckle for pivoting tooling, and keep the 8 mm rod free of side loads.
Quick checklist
At 0.5 MPa: 157.0 N push, 131.9 N pull. At 0.7 MPa: 219.8 N push. Theoretical maximum force is 32.0 kgf at 1.0 MPa. The cylinder runs on 0.15-1.0 MPa (22-145 psi) of 40 um filtered air at 30-800 mm/s.
The MAJ20X175-10S uses a stainless-steel round barrel with a 20 um hard-chrome plated carbon-steel rod, so the pair copes with humidity, washdown splash and outdoor exposure far better than painted or plain aluminium mini cylinders. The aluminium-alloy covers are riveted onto the tube, giving a compact sealed body.
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