Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X50-30SH
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X50-30SH is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 50mm 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
- Stroke50 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 MACJ20X50-30SH
Compact where it counts: the MACJ20X50-30SH takes the 20 mm MA platform with its 30 mm extend-trim window and variable cushion at each end. Double-acting throughout, it delivers 157 N forward and 132 N back at 0.5 MPa and 220 N forward at 0.7 MPa, with the piston riding in a stainless tube joined to aluminium covers by a rolling-packed seam.
The hard-chrome plated 8 mm rod shrugs off mild corrosion, so damp or washdown-adjacent stations are realistic duty. For vertical work, 157 N at 0.5 MPa is about 16 kgf theoretical; halve it and this cylinder lifts roughly 8 kg vertically with a 2:1 margin. Note that the trim screw is a mechanical end stop, not a mid-stroke lock - on air loss the piston drifts.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X50-30SH Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X50-30SH |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 50 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 MACJ20X50-30SH
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 MACJ20X50-30SH Is Used
Bench-top press assist
220 N at 0.7 MPa nudges bearings onto shafts during maintenance-bench assembly.
Dosing valve actuator
132 N of retract force pulls a pinch valve closed on a washdown-adjacent syrup line.
Deflector on a belt conveyor
Trims product flow at a merge point; the cushion absorbs the impact every single cycle.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X50-30SH the Right Cylinder?
If 157 N at 0.5 MPa feels oversized, the 16 mm bore at 100.5 N saves space; if the cycle needs more, the 25 mm bore pushes 245.3 N at the same pressure. Air supply is 0.15-1.0 MPa (22-145 psi), filtered to 40 um. FA flange and LB foot brackets cover fixed mounting, while I and Y knuckles suit swinging loads. The H suffix on this variant: confirm exact build detail from the datasheet before ordering. Also keep in mind the 30 mm window trims extend travel only - it cannot hold a mid-stroke position against a falling load.
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 MACJ20X50-30SH FAQ
On the 20 mm bore you get 157.0 N extend and 131.9 N retract at 0.5 MPa, 219.8 N extend and 184.7 N retract at 0.7 MPa, and 32.0 kgf theoretical peak at 1.0 MPa. Working pressure spans 0.15-1.0 MPa (22-145 psi).
Yes - the barrel is stainless steel with a hard-chrome plated 8 mm carbon-steel rod, and the covers are riveted on, so splash and condensation are handled without any paint to chip.
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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