Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X25-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X25-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 25mm 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.
- BoreØ20 mm
- Stroke25 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- 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 MACJ20X25-20S
A 20 mm trim window on a 25 mm stroke means this cylinder can be set anywhere from about 5 mm to the full 25 mm of extend travel on site. Double-acting throughout, it produces 157 N at 0.5 MPa (219.8 N at 0.7 MPa), and the variable air cushion at both ends lets you push the cycle toward 800 mm/s without hammering the covers.
Construction is AirTAC's round-body MA layout: a stainless-steel barrel, a hard-chrome plated carbon-steel rod and riveted aluminium covers that seal reliably in damp or dusty plants. The piston magnet is fitted as standard, so position switches from the CMSG, DMSG and EMSG range bolt on whenever the controller needs feedback.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X25-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X25-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MACJ20X25-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×25 | 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 MACJ20X25-20S Is Used
Small-batch label press on a contract packing bench
Operators dial the stroke down for short labels and back up for tall cartons without changing hardware.
Index pin on a rotary indexing table
A trimmed short throw seats the locking pin, and the magnet feeds a DMSG signal to confirm lock before the table turns.
Test fixture probe lower on electronics QC stands
The cushion stops the probe tip from bouncing at the bottom of travel, protecting delicate contact points.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X25-20S the Right Cylinder?
Force-wise the 20 mm bore (157 N at 0.5 MPa) covers duties between a 16 mm cylinder at 100.5 N and a 25 mm cylinder at 245.3 N; halve the push figure for a 2:1 design margin and it comfortably lifts around 8 kg vertically. The adjusting screw sets the extend stroke only - it is not a mid-stroke lock, and a dropped air line still lets the rod move. Mount with FA flange or LB feet and add I or Y knuckles if the tooling needs them (no SDB on adjustable models).
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 MACJ20X25-20S FAQ
Push 157 N and pull 131.9 N at 0.5 MPa; push 219.8 N and pull 184.7 N at 0.7 MPa; 32 kgf theoretical maximum at 1.0 MPa. The cylinder is double-acting with an adjustable extend stroke inside a 20 mm window, cushioned at both ends, rated 0.15-1.0 MPa (22-145 psi), and takes a 1/8" port.
Only standard filtered air to 40 um at 0.15-1.0 MPa (22-145 psi). The cushion screws at each cover are tuned by hand to match the load and speed, while the stop screw sets the extend stroke - keep the stainless barrel clean so both adjustments stay smooth across 30-800 mm/s operation.
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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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