Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X80-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X80-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø50mm bore and 80mm 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
- Stroke80 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 MACJ50X80-20S
Treat this as a fixed-stroke cylinder with a 20 mm safety band: the MACJ50X80-20S delivers 981 N push and 881 N pull at 0.5 MPa, and the external stop screw shortens the extend stroke anywhere in that 20 mm window without disassembly. It is double-acting throughout, with a variable air cushion at each end to absorb landing loads.
The round stainless body is riveted together with aluminium-alloy covers, shrugging off washdown humidity that defeats painted minis, and the magnet is fitted as standard so CMSG / DMSG / EMSG sensors bolt on whenever tracking is needed. Halve the 0.5 MPa push for a 2:1 lift margin and you get about 50 kg of vertical capacity - a clean match for lifting small dies, chucks or loaded totes.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X80-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X80-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 80 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 MACJ50X80-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×80 | 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 MACJ50X80-20S Is Used
Rotary table index pin
Locks a 4-station rotary table between drill cycles; the 20 mm window absorbs fixture tolerances without shimming the bracket.
Tote diverter at a sorter
Steers plastic totes between two conveyor lanes; 981 N at 0.5 MPa deflects a loaded tote while the cushion quiets the lane change.
Drill bench depth stop
Sets the final depth on a bench drilling fixture - twist the stop screw to shorten travel 20 mm when a shallower hole is scheduled.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X80-20S the Right Cylinder?
Compared with the 40 mm bore at 628 N and the 63 mm bore at 1558 N (both at 0.5 MPa), this 50 mm unit is the right call for mid-range loads of roughly 400 to 800 N working force. The adjuster is purely an end-of-travel stop, never a brake - with no air the piston will sag under load, so use a holding valve for suspended weight. FA flange, LB foot, I / Y knuckles and PT / G / NPT threads give the installer freedom, and the standard magnet pairs with the CMSG / DMSG / EMSG switch family.
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 MACJ50X80-20S FAQ
Push 981 N and pull 881 N at 0.5 MPa; push 1374 N and pull 1233 N at 0.7 MPa; theoretical maximum 200 kgf at 1.0 MPa. Supply 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, extend stroke trimmable within the 20 mm window, 16 mm hard-chrome rod, 1/4" ports.
No - every MA-series cylinder leaves the factory with a magnet in the piston, so CMSG, DMSG or EMSG reed / electronic switches mount directly on the barrel without ordering a special sensor-ready version.
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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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