Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X25-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X25-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø50mm bore and 25mm stroke, 1/4" 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.
- BoreØ50 mm
- Stroke25 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM14×1.5
- 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 MACJ50X25-20S
A short-travel workhorse: the MACJ50X25-20S moves its 16 mm rod just 25 mm, and the built-in stop screw trims the extend stroke across a 20 mm window on site, down to a few millimetres of effective travel when a fixture needs a lighter approach. Double-acting air and a variable cushion at each end keep the stops quiet even at the top of the 30-800 mm/s range. At 0.5 MPa this 50 mm bore pushes 981.3 N, near 100 kg of theoretical lift; sizing real work at about 589 N leaves headroom for friction and plant-air dips.
The body is a stainless round barrel riveted onto aluminium covers, with a hard-chrome plated rod that shrugs off scuff and rinse-down, a step up from painted minis in damp corners of a plant. The piston magnet ships as standard, so CMSG, DMSG or EMSG switches clip on without special ordering.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X25-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X25-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 25 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 500 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | 1234 N |
| Max (@1.0 MPa) | 200 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 MACJ50X25-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | 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 MACJ50X25-20S Is Used
Bracket staking press
A bench fixture staking aluminium terminals uses the 20 mm trim window to dial the 25 mm approach, working near 589 N of rated push at 0.5 MPa for clean, repeatable swages.
Rotary table clamp station
On an eight-station dial machine assembling sensor housings, the short 25 mm travel clamps each part while the adjustable stop absorbs fixture height changes between changeovers.
Carton flap tucker
Folding the near flap on small shipping cartons takes a quick 25 mm push; the 50 mm bore holds spare force when board grades stiffen, and cushions keep the tuck quiet.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X25-20S the Right Cylinder?
Look one size down and the 40 mm bore delivers 628.3 N push at 0.5 MPa; one size up, the 63 mm reaches 1557.9 N. Pick the 50 mm when a clamp or micro-press needs roughly the 100 kgf class force at 4 bar. Note the adjuster is an extend end stop, not a lock: if air drops, the rod can still drift, so block the supply where position must hold. Mount through the FA flange or LB foot, plumb the 1/4 ports at 0.15-1.0 MPa (22-145 psi), and thread tooling onto the M14x1.5 rod end.
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 MACJ50X25-20S FAQ
At 0.5 MPa it pushes 981.3 N and pulls 880.8 N; at 0.7 MPa, 1373.8 N push and 1233.1 N pull. Theoretical maximum force at 1.0 MPa is 200.1 kgf. Working pressure runs 0.15-1.0 MPa (22-145 psi) with speeds of 30-800 mm/s.
No. Every MA-series cylinder carries the piston magnet as standard, so CMSG, DMSG or EMSG switches mount straight onto the stainless barrel for end-of-stroke or zone signalling without a special-order piston.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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