Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 225mm 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.
- BoreØ20 mm
- Stroke225 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-20S
A compact 20 mm bore round-body cylinder built around a stainless-steel barrel and a hard-chrome plated rod, the MACJ20X225-20S runs double-acting with an adjustable extend stroke and a variable air cushion at each end. The external stop screw lets you trim the extend stroke anywhere within a 20 mm window on site, so one cylinder covers several stroke positions without re-ordering. At 0.5 MPa it pushes 157 N and pulls 131.9 N.
Because the riveted stainless barrel shrugs off washdown and damp air, it holds up where painted minis swell and flake. Plan on roughly 94 N of usable push at 0.5 MPa (about 60 percent of the rating) when sizing a real load, which is the equivalent of lifting about 8 kg vertically at a 2:1 margin. A magnet is built in as standard, so CMSG, DMSG or EMSG switches clip straight on.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 225 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| 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 | Variable air cushion, both ends |
| 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.
Theoretical Output Force (Ø20mm)
| 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.
Model Code: Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×225 | Stroke length in mm. |
| -20 | 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.
Where the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-20S Is Used
Bottle reject gate
Kicking dented PET bottles off a bottling line - 157 N at 0.5 MPa is ample for light containers, and the 20 mm trim is dialled in during commissioning.
Carton flap tucker
Folding top flaps on small carton cases at up to 800 mm/s, with the dual cushions stopping the flap plate without denting the board.
Sample tray pusher
Sliding sample trays into an analytical oven: the stainless barrel tolerates humid lab washdown and the standard magnet feeds a CMSG switch to confirm full retract.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-20S the Right Cylinder?
At 157 N of push (0.5 MPa) the 20 mm bore sits between the 16 mm bore (100.5 N) and the 25 mm bore (245.3 N) - drop to 16 for light indexing, step up to 25 if your clamp needs more than about 94 N of working force. The stop screw trims the extend stroke within 20 mm only and cannot hold a load on its own; add a check valve or external stop if position must survive a pressure drop. Choose FA flange or LB foot mounting, and remember the magnet is already fitted for CMSG / DMSG / EMSG sensing.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) is standard for sensors
- ✓ Back cover (CA/U/CM) & mount (FA/LB/SDB)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X225-20S FAQ
At 0.5 MPa it pushes 157 N and pulls 131.9 N; at 0.7 MPa that rises to 219.8 N push and 184.7 N pull. The theoretical maximum at 1.0 MPa is 32 kgf. It runs on 0.15-1.0 MPa (22-145 psi) air and cycles at 30-800 mm/s.
Yes - every MACJ20X225-20S ships with the magnet built in, so CMSG, DMSG and EMSG switches mount on the barrel with no special-order piston.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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