Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X45-30S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X45-30S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 45mm 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
- Stroke45 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 MACJ25X45-30S
If your last mini cylinder cracked a cover from slamming, this is the fix: the MACJ25X45-30S carries a variable air cushion at both ends, so you can raise cycle speed toward 800 mm/s and still land the rod soft. The round stainless barrel with its riveted aluminium covers shrugs off splashes and condensation, and the 20 um hard-chrome rod resists scoring in gritty or wet spots.
As a double-acting unit it pushes 245.3 N and pulls 206.1 N at 0.5 MPa - a theoretical 50 kgf at 1.0 MPa. The -30 suffix means the extend stroke can be trimmed up to 30 mm with the external stop screw, handy when a 45 mm nominal travel turns out longer than the jig actually needs. Plan real work around 147 N, or about 12 kg of vertical lift with a 2:1 margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X45-30S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X45-30S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 45 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 MACJ25X45-30S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×45 | Stroke length in mm. |
| -30 | 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 MACJ25X45-30S Is Used
Kick-off diverter on a narrow belt line
Pushes 245 N at 0.5 MPa to swing small cartons off a 200 mm belt; cushioning at both ends keeps the diverter from rattling loose at speed.
Index stop on a rotary indexing table
The 30 mm trim range lets commissioning set the exact stop height for each fixture; hard-chrome rod tolerates constant stop contact and coolant mist.
Pallet-corner guard extension on AGV doors
Roughly 12 kg of vertical lift capacity with margin suits spring-balanced guards; stainless barrel handles outdoor dock humidity.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X45-30S the Right Cylinder?
Compare before you commit: bore 20 manages 157.0 N push at 0.5 MPa and costs less, while bore 32 reaches 402.2 N if your clamp or lift needs real headroom. This 25 mm unit sits in the middle, and its 45 mm stroke with a 30 mm trim range suits machines where the exact extend position is dialled in during commissioning.
Do not treat the adjuster as a brake - with air lost, a suspended load will drift the rod back. The magnet is built in as standard, so CMSG / DMSG / EMSG switches mount without special ordering; choose FA flange or LB foot, and I or Y knuckles where the rod should pivot.
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 MACJ25X45-30S FAQ
At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa, push 343.4 N and pull 288.5 N; theoretical maximum 50 kgf at 1.0 MPa. It runs on 0.15-1.0 MPa (22-145 psi) air filtered to 40 um, proof pressure 1.5 MPa (215 psi), speed 30-800 mm/s, bore 25 mm, 10 mm rod, 1/8" ports.
An external stop screw shortens the extend stroke anywhere inside the ordered 30 mm window - it trims travel, it never extends past 45 mm. Set it during commissioning and re-dial it when the tooling changes. Pair it with the standard built-in magnet and CMSG / DMSG / EMSG switches for end-position sensing.
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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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