Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X300-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X300-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 300mm 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
- Stroke300 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 MACJ25X300-20S
Fine adjustment on a long throw is the MACJ25X300-20S brief: 300 mm of double-acting travel, trimmable down 20 mm with the stop screw, plus a variable air cushion at each end to kill end-of-stroke shock. At 0.5 MPa the bore 25 piston pushes 245.3 N and pulls 206.1 N, climbing to 343.4 N push at 0.7 MPa; treat about 147 N as the honest working force and count on near 12.5 kg of vertical lift with margin. Supply runs 0.15-1.0 MPa (22-145 psi) at 30-800 mm/s.
Construction is a riveted round body - stainless barrel, aluminium-alloy covers, hard-chrome carbon-steel rod - that copes with coolant mist and humid plants far better than painted minis. The magnet is built in as standard, so CMSG, DMSG or EMSG switches bolt on without ordering a sensored piston.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X300-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X300-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 300 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 MACJ25X300-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×300 | 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 MACJ25X300-20S Is Used
Soil lab oven pusher
Feeds sample trays 300 mm into a drying oven, the 20 mm trim aligning the tray stop with the oven shelf after installation.
SMD magazine indexing
Advances component magazines along a pick-and-place rack, variable cushions easing each 300 mm index into the stop.
Textile take-up roll offset
Positions a cloth take-up roll on a weaving machine, 245.3 N push at 0.5 MPa tracking fabric tension over long shifts.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X300-20S the Right Cylinder?
Bore 20 tops out at 157.0 N push at 0.5 MPa and bore 32 steps up to 402.2 N, so pick 25 when 245.3 N covers the job with headroom. The 20 mm trim is for dialling in stop position after install - it cannot hold a load mid-stroke, and the rod still drifts if air is lost. Mount with the FA flange, LB foot, or I/Y rod knuckles; over 300 mm of travel, guide side loads separately so the 10 mm rod stays straight.
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 MACJ25X300-20S FAQ
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; 50 kgf theoretical maximum at 1.0 MPa. The 300 mm stroke trims up to 20 mm via the adjuster, cushions are variable at both ends, ports are 1/8", and the rod thread is M10x1.25.
The piston magnet ships standard with every MACJ, so CMSG, DMSG and EMSG reed or electronic switches mount directly on the barrel for position feedback. Combined with the grease-storing two-way piston seal and the variable cushions, the cylinder runs 30-800 mm/s with minimal attention.
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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