Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X180-30S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X180-30S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 180mm 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
- Stroke180 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 MACJ20X180-30S
A 180 mm stroke with a 30 mm extend-trim window makes the MACJ20X180-30S a natural fit for machines where the exact end position only reveals itself during commissioning: back off the external stop screw and the extend stroke lands anywhere in that 30 mm band, without shims or re-ordering. The cylinder is double-acting and carries a variable air cushion at both ends, so even a fast 800 mm/s approach can be decelerated gently before it reaches the covers.
The round barrel is stainless steel with aluminium covers rolled on, and the carbon-steel rod carries a 20 um hard-chrome plating - a build that tolerates damp aisles and light washdown far better than painted minis. At 0.5 MPa the 20 mm bore pushes 157 N; budgeted for real work that is about 94 N of usable push, roughly an 8 kg vertical lift with margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X180-30S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X180-30S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 180 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 MACJ20X180-30S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×180 | Stroke length in mm. |
| -30 | 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 MACJ20X180-30S Is Used
Carton stop on a transfer conveyor
A 157 N push at 0.5 MPa stops light cartons reliably, and the 30 mm extend trim lets you fine-set where the stop face sits relative to the lane.
Part eject off a small fixture
After a drilling or pressing step, the double-acting piston retracts itself to clear the fixture; the end-of-stroke cushion protects the eject face at speed.
Gate position feedback
Because the magnet is built in as standard, a CMSG or EMSG switch confirms full extend and retract on an automated gate with no extra plumbing.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X180-30S the Right Cylinder?
Size it against neighbours: the MACJ16 family pushes about 100 N at 0.5 MPa, while stepping up to bore 25 lifts you to 245 N - choose bore 20 when the load sits between those. The trim screw is a mechanical end stop for the extend stroke only; it will not clamp a load if air pressure drops, so add a valve or external stop where holding matters. Mount with the FA flange or LB foot, and I or Y rod knuckles if the linkage needs a swivel; the built-in magnet is standard, so CMSG or DMSG switches clip straight on. A 180 mm stroke with an 8 mm rod is fine for in-line pushing, but keep side loads off the rod or guide them externally.
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 MACJ20X180-30S FAQ
At 0.5 MPa the 20 mm bore pushes 157.0 N and pulls 131.9 N; raise supply to 0.7 MPa and those figures become 219.8 N push and 184.7 N pull, with a theoretical ceiling of 32.0 kgf at 1.0 MPa. Working pressure is 0.15-1.0 MPa (22-145 psi) and rod speed runs 30-800 mm/s.
An external stop screw shortens the extend stroke anywhere within the ordered 30 mm band, so you can retune the end position after mount alignment or changeovers. It is a positive mechanical stop, not a brake - if air is lost the rod can still be pushed back - and the variable cushion at both ends still applies wherever you set it.
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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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