Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X80-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X80-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 80mm 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
- Stroke80 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 MACJ25X80-40S
End-of-stroke hammering is what shortens the life of small cylinders on fast cycles; this 25 mm MACJ counters it two ways - a variable air cushion at both ends and a stop screw that trims the extend stroke within a 40 mm window. Double-acting throughout, it develops 245.3 N of push at 0.5 MPa on supplies from 0.15-1.0 MPa (22-145 psi).
Construction is the MA round body: a stainless tube rolled onto aluminium covers with a hard-chrome plated rod that resists rust and scoring in wet or dusty plants. Budget about 147 N for actual work at 0.5 MPa - enough to raise roughly 12 kg vertically once you take a 2:1 margin. Position feedback comes without special ordering: the magnet is built in, ready for CMSG / DMSG / EMSG switches.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X80-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X80-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 80 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 MACJ25X80-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -40 | 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 MACJ25X80-40S Is Used
Tote stopper gate
Raising a stopper under totes on a roller conveyor; the 40 mm trim matches gate lift height to tote sizes without shims.
Bench tapping unit advance
Feeding a tapping head into mild steel plate; at 0.7 MPa the bore delivers 343.4 N, ample for a 12 kg cutting head with margin.
Cosmetics lid press
Snapping caps onto 50 ml jars on a filling line, with cushions softening the snap so labels never scuff.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X80-40S the Right Cylinder?
If the stroke never needs trimming, the fixed-stroke MAC covers the same 25 mm bore; if the load hangs on both sides of the piston, look at the double-rod MACD. For this model, plan the force window: 100.5 N from a 16 mm bore at 0.5 MPa up to 402.2 N from a 32 mm bore, with this unit's 245.3 N in the middle. The trim stop cannot lock the piston mid-stroke - on air loss the load will drift, so hold loads with valving instead. The 80 mm stroke is short, but keep external guides on the load so side forces never ride the hard-chrome rod. Mounts: FA flange, LB foot, I or Y knuckle.
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 MACJ25X80-40S FAQ
At 0.5 MPa it delivers 245.3 N on extend and 206.1 N on retract; at 0.7 MPa those become 343.4 N and 288.5 N. The theoretical maximum is 50 kgf at 1.0 MPa. This is a 25 mm bore with a 10 mm rod, 1/8" air port, M10x1.25 male rod thread, 0.15-1.0 MPa (22-145 psi) working pressure and 30-800 mm/s speed.
Advance the cylinder at working speed and close each cushion screw gradually until the load stops without bounce; variable cushioning at both ends means you can raise cycle speed as high as 800 mm/s while still landing soft. The stop screw then trims the extend stroke anywhere inside the 40 mm window - it shortens travel only and never pushes the stroke past the ordered 80 mm.
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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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