Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X150-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X150-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 150mm 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
- Stroke150 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 MACJ20X150-40S
Two numbers define this model: 150 mm of base stroke and a 40 mm adjustable window that shortens the extend stroke wherever the job needs. MACJ means double-acting with a variable air cushion at each end, so heavier or faster moves at up to 800 mm/s land softly.
At 0.5 MPa the 20 mm bore produces 157 N of push. Round that down to about 94 N of usable work force, or figure roughly 8 kg of vertical lifting capacity with a safety margin. Wet, dusty or outdoor stations benefit from the stainless tube and hard-chrome rod, and the FA / LB mount options cover flange and foot fixes.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X150-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X150-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 150 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 MACJ20X150-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×150 | Stroke length in mm. |
| -40 | 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 MACJ20X150-40S Is Used
Case elevator stop on a packaging line
Set the extend stop inside the 40 mm window so carton stacks halt flush against the back gauge; the cushion absorbs the impact.
Clamp fixture for aluminium window frames
About 94 N of practical clamping force at 0.5 MPa holds light profiles during screw driving on an assembly bench.
Door actuator on a cold-store hatch
Stainless barrel and chrome rod cope with condensation near chilled aisles while the magnet feeds a DMSG position signal.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X150-40S the Right Cylinder?
Sizing check: a 16 mm bore MA manages 100.5 N push at 0.5 MPa, a 25 mm bore manages 245.3 N - this 20 mm unit sits between. If the task involves holding position, note the adjuster only limits extend travel; it is not a brake, and the rod will drift if air pressure drops. Magnet is built in as standard, so add CMSG switches for end-of-stroke confirmation. On strokes like 150 mm, support long or overhung loads to keep bending stress off the 8 mm rod.
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 MACJ20X150-40S FAQ
Push 157 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 maximum at 1.0 MPa. Air supply runs 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, extend stroke trimmable over 40 mm with a variable cushion at both ends.
Independent cushion valves at each end bleed air near the last millimetres of travel. Turn them to slow the piston before it reaches the cover, so you can raise speed or payload without metal-to-metal slam. Combined with the 40 mm stop screw, you control both where the stroke ends and how hard it lands.
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Standard models are processed and dispatched in 3-5 business days.
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