Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X35-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X35-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 35mm 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.
- BoreØ25 mm
- Stroke35 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM10×1.25
- 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 MACJ25X35-20S
A compact round-body actuator with a movable target: the MACJ25X35-20S runs double-acting on a 25 mm bore and lets you trim the extend stroke anywhere within a 20 mm window via its external stop screw, while a variable air cushion at each end soaks up end-of-travel shock. The stainless barrel and hard-chrome plated rod shrug off washdown and mild corrosion far better than painted minis.
At 0.5 MPa this bore delivers 245.3 N pushing and 206.1 N pulling (343.4 N push at 0.7 MPa, up to 50 kgf theoretical). Plan on roughly 147 N of actual working force at 0.5 MPa so the cylinder never sits on its limit. Every unit ships with a built-in magnet, so CMSG, DMSG or EMSG switches clip straight on without a special-order piston.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X35-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X35-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 35 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 MACJ25X35-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×35 | 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 MACJ25X35-20S Is Used
Conveyor stopper pin
Pops up to index or halt cartons on a food-line conveyor, where the stainless barrel shrugs off daily washdown and the 20 mm trim dials in the exact stop height.
Small clamp jig
Clamps PCB fixture lids on an electronics assembly bench; about 147 N of usable clamp force at 0.5 MPa holds light parts firmly without marking them.
Carton flap tucker
Folds flaps on a low-speed cartoning machine, with the variable cushion softening every tuck and a DMSG switch confirming the fold at 30-800 mm/s line speeds.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X35-20S the Right Cylinder?
For a 35 mm stroke in this force band, the bore 20 MAJ offers 157.0 N push and the bore 32 MACJ offers 402.2 N at 0.5 MPa - step up if your load margin looks thin. The stop screw sets the extend endpoint only; it is not a mid-stroke lock, so the rod will drift if air is lost. Mount via FA flange or LB foot, add I or Y rod knuckles if the linkage needs a pivot, and connect to the 1/8" ports.
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 MACJ25X35-20S FAQ
On a 25 mm bore: 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, and 50 kgf theoretical maximum at 1.0 MPa. It is double-acting with a 20 mm adjustable extend-stroke window and a variable air cushion at both ends, running 0.15-1.0 MPa (22-145 psi) at 30-800 mm/s.
No. The magnet is built in as standard on the MA series, so CMSG, DMSG and EMSG switches mount directly on the stainless barrel. The riveted round body keeps the switch track clean, and the variable cushion keeps the piston from slamming past the sensing zone at speed.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
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