Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X25-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X25-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 25mm 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
- Stroke25 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 MACJ25X25-20S
A 20 mm tuning window on a 25 mm extend stroke gives the MACJ25X25-20S room to breathe: the stop screw can set travel anywhere from 5 mm up to the full 25 mm, and the variable air cushion at both ends lets you raise line speed without hammering the aluminium covers. Double-acting throughout, it pushes 245 N and pulls 206 N at 0.5 MPa.
The round stainless barrel is rolled together with the front and back covers and a stainless block, a packed construction that seals reliably in dusty or damp plants. Hard-chrome plating 20 um thick protects the carbon-steel rod against corrosion and rod-seal wear. A magnet is built into the piston as standard, so snap a CMSG, DMSG or EMSG switch on whenever end-of-stroke confirmation is needed. Budget about 147 N of usable push at 0.5 MPa, which corresponds to a vertical lift of roughly 12.5 kg at a 2:1 safety factor.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X25-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X25-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 25 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 MACJ25X25-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×25 | 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 MACJ25X25-20S Is Used
Chute flap sorting on a bottling line
Deflecting reject bottles between chutes needs exactly this force class - 245 N at 0.5 MPa swings the flap, the 20 mm window absorbs differences between flap linkages, and the cushions quiet high-rate cycling.
Lift gate on a small-parts elevator
A counterweighted lift gate on a small-parts elevator opens under about 147 N of working force - comfortably inside this rating - and two CMSG switches on the standard magnet signal open and closed positions.
Label-head preload adjustment
Setting the kiss pressure of a labelling head against passing bottles: trim the 25 mm stroke down through the 20 mm window at each changeover, while the hard-chrome plated rod resists the sticky adhesive mist.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X25-20S the Right Cylinder?
Compare by force at one pressure: the bore 20 pushes 157 N at 0.5 MPa, this bore 25 model 245 N, and the bore 32 jumps to 402 N - pick the bore on load first, then the window on how much stroke variance your fixtures show. Note that the mechanical stop trims the extend stroke only and retains nothing: with air removed the rod can settle back, so clamp or latch the part separately. FA flange and LB foot brackets plus I and Y rod knuckles cover the mounting set, and the 1/8" ports keep the plumbing compact inside guard panels.
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 MACJ25X25-20S FAQ
At 0.5 MPa it pushes 245 N and pulls 206 N; at 0.7 MPa, 343 N and 288 N; theoretical peak 50 kgf at 1.0 MPa. It runs on 0.15-1.0 MPa (22-145 psi), tolerates 1.5 MPa (215 psi) proof pressure, cycles at 30-800 mm/s, and carries a 20 mm adjustable window on its 25 mm extend stroke.
The variable air cushion at both ends absorbs the deceleration energy, so you can push speeds toward 800 mm/s or move heavier loads without metal-to-metal impact on the covers. Each end is set by a simple screw adjustment, independent of the 20 mm stroke-trim stop screw.
Authorized Export Seller
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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