Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X75-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X75-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 75mm 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
- Stroke75 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 MACJ25X75-20S
Twenty millimetres of on-machine adjustment suits fixtures that get re-tuned between changeovers: the MACJ25X75-20S stop screw pulls the extend stroke back anywhere inside that 20 mm window, with a variable cushion softening each landing. Double-acting, 0.15-1.0 MPa (22-145 psi), 30-800 mm/s.
AirTAC rolls the stainless barrel onto aluminium covers in a riveted MA package and plates the rod with 20 um of hard chrome, so damp plants and outdoor cells do not chew it up the way they do painted minis. Force at this bore: 245.3 N push, 206.1 N pull at 0.5 MPa; 343.4 N push at 0.7 MPa; 50 kgf theoretical ceiling. Budget about 147 N for the actual task - roughly 12 kg lifted vertically at a 2:1 safety factor.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X75-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X75-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 75 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 MACJ25X75-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×75 | 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 MACJ25X75-20S Is Used
Lane gate on a bakery tray line
Adjust gate throw in 20 mm steps when tray sizes change; 245 N at 0.5 MPa swings lightly loaded gates all day.
Changeover stop on an SMT feeder rail
Reset the stop depth per magazine type without loosening brackets; the cushion keeps rails from bouncing at 800 mm/s.
Flap tuck on a horizontal cartoner
Match the tuck depth to board thickness with the stop screw; 343.4 N at 0.7 MPa seats stubborn flap folds.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X75-20S the Right Cylinder?
One bore down, the 20 mm MA gives 157 N at 0.5 MPa; one bore up, the 32 mm reaches 402.2 N - 245.3 N here sits comfortably in between for clamping and pushing. Keep in mind the trim screw shortens extend travel only; with air off the rod coasts, so a check or locking valve is needed where a load must stay put. FA flange and LB foot both bolt to the same barrel, and the magnet that ships inside works with CMSG / DMSG / EMSG switches out of the box. Over the 75 mm stroke, limit side-load on the 10 mm rod to protect the bushings.
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 MACJ25X75-20S FAQ
Push 245.3 N, pull 206.1 N at 0.5 MPa; push 343.4 N, pull 288.5 N at 0.7 MPa; 50 kgf theoretical maximum at 1.0 MPa. It runs on 40 um filtered air at 0.15-1.0 MPa (22-145 psi), 30-800 mm/s.
Each end carries a variable air cushion adjusted from the cover: open it up for fast cycling near 800 mm/s, close it for gentle stops on fragile or seated loads. The cushion absorbs shock but is not a position lock.
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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