Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X250-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X250-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 250mm 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
- Stroke250 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 MACJ25X250-20S
Mid-range automation gets a flexible workhorse in the MACJ25X250-20S: a double-acting AirTAC MA mini cylinder with a 20 mm window, letting the 250 mm extend stroke be set anywhere from 230 to 250 mm on site. A variable air cushion at both ends tames end-of-travel impact across the 30-800 mm/s speed band, on 40 um filtered air at 0.15-1.0 MPa (22-145 psi).
Force output at this bore is 245 N extend and 206 N retract at 0.5 MPa, climbing to 343 N and 288 N at 0.7 MPa with a 50 kgf theoretical maximum. The riveted stainless barrel and chrome-plated 10 mm rod stand up to washdown and condensation, and the standard-fit magnet drops CMSG, DMSG or EMSG switches straight on. In practice expect about 147 N of dependable push, roughly a 12 kg vertical lift at a 2:1 margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X250-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X250-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 250 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 MACJ25X250-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×250 | 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 MACJ25X250-20S Is Used
Sorting gate actuator
Swings a diverter flap between two conveyor lanes at a distribution hub, with the 20 mm window matching two different chute widths.
Fixture clamp riser
Lifts a drill jig clamp plate 230-250 mm on a machining cell pallet, cushioned both ends for chatter-free stops on the aluminium fixture.
Case kicker at case packer
Kicks misaligned cases off a case-packer infeed, where 245 N at 0.5 MPa is ample for light corrugate at full line speed.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X250-20S the Right Cylinder?
For lighter duties the bore 20 version gives 157 N at 0.5 MPa; heavier clamping belongs to the bore 32 size at 402 N. The 20 mm window is a common middle ground for fixtures re-tooled between product sizes. Long 250 mm travel means external linear guidance keeps bending loads off the rod. Pick FA flange or LB foot mounting and I or Y knuckles as the job demands; switches mount without options thanks to the standard magnet. Note that the stop screw shortens extend travel only and holds nothing - under air loss the piston drifts, so valve interlocks handle safety.
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 MACJ25X250-20S FAQ
The MACJ25X250-20S produces 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, and a theoretical 50 kgf maximum. Its 250 mm stroke trims within a 20 mm window to as short as 230 mm, with variable cushions at both ends, 30-800 mm/s speed and 0.15-1.0 MPa (22-145 psi) operating pressure.
Yes - FA flange and LB foot brackets plus I and Y rod knuckles cover most frame layouts, and the factory-installed magnet lets CMSG, DMSG and EMSG switches read end positions without adding any external bracketry to the round barrel.
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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