Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X80-50S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X80-50S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 80mm 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
- Stroke80 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 MACJ20X80-50S
With a 50 mm adjustment window, the extend stroke of the MACJ20X80-50S can be set anywhere from 30 to 80 mm on site by a simple stop screw, no cylinder swap needed. The unit is double-acting and carries a variable air cushion at each end, so you can push cycle speed up within the 30-800 mm/s band without the piston hammering the covers.
At 0.5 MPa this 20 mm bore produces 157 N forward and 132 N on retract; at 0.7 MPa push climbs to 220 N. Plan the actual workload around 94 N - roughly six tenths of the rating - and the cylinder will hold that all day. The rolling-packed stainless barrel with a hard-chrome plated rod also shrugs off washdown and condensation that quickly rust painted minis.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X80-50S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X80-50S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 80 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 MACJ20X80-50S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -50 | 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 MACJ20X80-50S Is Used
Vial presence check on a pharma filling line
The 50 mm trim window lets technicians match the probe approach to each vial format, and the built-in magnet drives a DMSG switch for PLC confirmation at every cycle.
Bottle ejector on a tabletop bottler
132 N of pull force retracts the pusher fast between bottles, while both-end cushioning keeps the 80 mm travel quiet across 30-800 mm/s line speeds.
Bracket clamp on a bench drilling jig
Around 94 N of usable clamp force at 0.5 MPa secures small aluminum parts, and the stainless barrel tolerates cutting-fluid splash.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X80-50S the Right Cylinder?
Bore 16 manages about 100 N at 0.5 MPa while bore 25 delivers 245 N, so the 20 mm bore sits right for mid-weight mini duties between those points. Note that the stop screw defines the extend limit mechanically; it will not pin the rod if air pressure fails, so use a valving solution wherever holding matters. FA flange, LB foot and I / Y rod knuckles suit most frames, and the standard built-in magnet accepts CMSG, DMSG or EMSG switches without special ordering.
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 MACJ20X80-50S FAQ
At 0.5 MPa the bore pushes 157 N and pulls 132 N; at 0.7 MPa push rises to 220 N, with a theoretical peak of about 32 kgf. Working pressure is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-800 mm/s, port 1/8", male rod thread M8x1.25, and the extend stroke trims by up to 50 mm.
Yes. Every MA-series unit ships with the piston magnet fitted as standard, so CMSG, DMSG and EMSG reed or Hall switches simply clip onto the 20 mm body - no special piston and no factory wait.
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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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