Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X80-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X80-20S 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 MACJ25X80-20S
A 25 mm round-body mini cylinder for machines where the forward stroke must land on one fixed, repeatable position. It is double-acting, so air drives the rod both ways, and the stop screw trims the extend stroke anywhere inside the ordered 20 mm window. A variable air cushion at both ends lets you run 30-800 mm/s without hammering the covers. At 0.5 MPa the bore pushes with 245.3 N; working pressure spans 0.15-1.0 MPa (22-145 psi).
The stainless barrel and hard-chrome plated carbon-steel rod shrug off washdown and damp shop air, a real edge over painted minis in food or outdoor cells. For sizing, treat the rating conservatively: about 147 N of usable push at 0.5 MPa, roughly enough to lift 12 kg vertically with a 2:1 margin. A magnet is built in as standard, so CMSG / DMSG / EMSG switches drop on with no special-order piston.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X80-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X80-20S |
|---|---|
| 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 MACJ25X80-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×80 | 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 MACJ25X80-20S Is Used
Vial tray indexing
Stepping a 12-vial tray into a filling nest on a pharma line, with the 20 mm trim set to a repeatable register position at up to 800 mm/s.
Drill jig clamp
Swinging a clamp arm onto aluminium brackets before each drilling cycle; the dual cushions absorb the clamp hit on short cycles.
Bottling reject gate
Kicking under-filled bottles off a conveyor at 300 mm/s while a CMSG switch on the built-in magnet confirms the gate has parked.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X80-20S the Right Cylinder?
Compare across the MA family before ordering: the 16 mm bore gives 100.5 N at 0.5 MPa, this 25 mm bore 245.3 N, and the 32 mm bore 402.2 N - pick the smallest that clears the load. Note the trim stop shortens the extend stroke only; it is a mechanical end stop, not a mid-stroke brake, so the rod can still be back-driven if supply air is lost. Mount on the FA flange or LB foot, add an I or Y knuckle for a swivelling load, and remember adjustable versions carry no SDB or back-cover code. Port size is 1/8" on this bore with an M10x1.25 male rod thread.
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 MACJ25X80-20S FAQ
At 0.5 MPa: 245.3 N push and 206.1 N pull. At 0.7 MPa: 343.4 N push and 288.5 N pull. Theoretical maximum is 50 kgf at 1.0 MPa. Bore is 25 mm with a 10 mm rod, 1/8" port and M10x1.25 male rod thread; supply 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-800 mm/s, fluid air filtered to 40 um.
The stop screw shortens the extend stroke anywhere within the 20 mm window, so the forward position is set on site and re-set at changeover - it trims, never lengthens. The round body is a stainless barrel rolled onto aluminium covers with a hard-chrome plated 10 mm rod, so mild corrosion and washdown are far less of a worry than on painted mini cylinders. Cushioning is variable at both ends.
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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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