Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 75mm 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
- Stroke75 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 MACJ20X75-20S
Stainless barrel, rolled-on aluminium covers and a 20 um hard-chrome rod give the MACJ20X75-20S a body that laughs at condensation and mild washdown where painted mini cylinders corrode. It is double-acting, cushioned variably at both ends, and ships with the position magnet already fitted.
Inside its 20 mm adjust window an external stop screw sets the extend stroke shorter than the full 75 mm, handy for dialing in part stops. At 0.5 MPa expect 157 N of push and 131.9 N of pull; sizing around 94 N of actual work leaves headroom, roughly an 8 kg vertical lift at a 2:1 ratio.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 75 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 MACJ20X75-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 MACJ20X75-20S Is Used
Welding fixture clamp
Clamps brackets in a small welding fixture; 157 N at 0.5 MPa holds light steelwork, and the stainless body tolerates sparks-spattered, humid fab shops.
Bottle rejection ejector
Kicks rejected bottles off an inspection conveyor; the 20 mm window tunes the push distance to match bottle diameters without re-plumbing.
Test rig part lift
Raises small test fixtures in a lab automation cell; sized around 94 N of working force it lifts roughly 8 kg vertically with a comfortable margin.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-20S the Right Cylinder?
Size against neighbours: 16 mm pushes 100.5 N and 25 mm pushes 245.3 N at 0.5 MPa, so this 20 mm sits mid-band at 157 N. Its 20 mm window trims the extend stroke down only; it cannot lengthen travel past 75 mm. The end stop is not a mid-stroke lock, and with air off the rod will creep under load, so use a valve circuit to hold position. Choose FA flange or LB foot, I or Y knuckles, and count on the standard magnet for CMSG / DMSG / EMSG switches.
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 MACJ20X75-20S FAQ
Push 157.0 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 peak at 1.0 MPa. Bore 20 mm, 8 mm rod threaded M8x1.25, 1/8 in port, proof pressure 1.5 MPa (215 psi), speed 30-800 mm/s, temperature -20 to +70 C, and a 20 mm band for shortening the extend stroke.
FA flange and LB foot brackets plus I and Y rod knuckles cover most fit-ups. The magnet is built in as standard, so CMSG, DMSG or EMSG switches drop onto the barrel without ordering a special piston. The adjuster is an end stop for the extend stroke; it does not lock the piston when air pressure is lost.
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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