Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X150-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X150-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm 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.
- BoreØ40 mm
- Stroke150 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM12×1.25
- 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 MACJ40X150-20S
MACJ40X150-20S pairs a 40 mm bore with a 150 mm stroke and a 20 mm adjustable window, so the extend stroke can be trimmed on site without swapping hardware. It is double-acting with a variable air cushion at both ends and delivers 628.3 N pushing and 527.8 N pulling at 0.5 MPa, rising to about 880 N and 739 N at 0.7 MPa. For day-to-day sizing, treat roughly 377 N - six tenths of the push rating - as the realistic working output at 0.5 MPa.
The riveted round body rolls a stainless-steel barrel onto aluminium-alloy covers with a hard-chrome plated rod, so it stands up to damp, washdown-prone cells far better than painted minis. A magnet is built in as standard, letting CMSG, DMSG or EMSG switches clip on for end-of-stroke signalling. It runs 30-800 mm/s on a 0.15-1.0 MPa (22-145 psi) supply.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X150-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X150-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| 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 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MACJ40X150-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 MACJ40X150-20S Is Used
Pick-and-place on packaging lines
Gripping and seating snack packs with fixture guidance keeps demand comfortably under the 377 N working push at 0.5 MPa, while the 20 mm trim window dials in exact pack positioning.
Stopper gates on accumulation conveyors
Raising and lowering bottle stoppers in a bottling plant needs quick 150 mm action; dual variable cushions soften the cycle even at 800 mm/s.
Gate confirmation on assembly fixtures
With the standard magnet, a CMSG switch signals the trimmed stroke end so the PLC verifies the part is fully seated before welding starts.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X150-20S the Right Cylinder?
At 0.5 MPa this bore sits between the 25 mm MACJ (245.3 N push) and the 50 mm MACJ (981.3 N push); choose down if your load needs under about 240 N and up when it exceeds roughly 620 N. Note the adjuster only sets where the extend stroke ends - it will not hold a load if air pressure drops, so fit a locking or blocking valve where drift matters. FA flange and LB foot mounts plus I and Y rod knuckles cover most fixtures, and the standard magnet means sensor brackets drop straight on. Over 150 mm of travel, guide the load so side loads stay off the 16 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 MACJ40X150-20S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa that is 879.6 N and 738.9 N, with a theoretical maximum of 128.1 kgf at 1.0 MPa. The -20 code sets a 20 mm window in which the extend stroke can be trimmed, on a 150 mm stroke with a 16 mm rod and a 1/8" port.
Yes. The stainless-steel barrel and hard-chrome plated rod resist mild corrosion and washdown better than painted minis, and the riveted aluminium covers keep the joint sealed. A magnet is standard, so CMSG, DMSG or EMSG switches mount directly for stroke-end detection.
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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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