Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X450-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X450-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø50mm bore and 450mm 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
- Stroke450 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 MACJ50X450-20S
Medium-force pushing over a long 450 mm stroke is this cylinder's job: 981.3 N of push and 880.8 N of pull at 0.5 MPa (22-145 psi across the band), 1373.8 N at 0.7 MPa, and 200.1 kgf theoretical at 1.0 MPa. The 20 mm adjust window gives a short on-site trim of the extend stop, and the two-end variable air cushion protects the covers when cycles run fast. For lift work, count on roughly 50 kg vertical capacity with a 2:1 margin.
The round stainless barrel is rolled onto aluminium covers with grease-storing heterogeneous piston seals inside, and the carbon-steel rod carries a 20 um hard-chrome plating, a spec that survives food splash and outdoor rain without paint. A magnet is built in as standard, so CMSG, DMSG or EMSG switches attach immediately. Keep in mind the stop screw sets the extend endpoint only; it will not hold a load if supply air fails.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X450-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X450-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 450 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 MACJ50X450-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×450 | 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 MACJ50X450-20S Is Used
Sorter divert arm
Swings divert arms on a parcel sorter; the trim screw sets arm parking depth within 20 mm and sensors confirm position.
Concrete block mould ejector
981 N at 0.5 MPa ejects green blocks from steel moulds in a dusty yard plant.
Sluice gate trim actuator
The 450 mm stroke raises small waterworks sluice gates, with the chrome rod resisting constant splash.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X450-20S the Right Cylinder?
Compare by working force: this 50 mm bore offers about 589 N of usable push at 0.5 MPa, while the 40 mm size offers about 377 N (628.3 N rated) and the 63 mm about 935 N (1557.9 N rated). Pick the 20 mm window when changeovers move the stop by a few millimetres only. FA flange and LB foot mounts, plus I or Y rod knuckles, cover most frames; with 450 mm of stroke, support the load in an external guide so side force never reaches the rod. Speed runs 30-800 mm/s with cushion adjustment at both heads.
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 MACJ50X450-20S FAQ
At 0.5 MPa: 981.3 N push, 880.8 N pull. At 0.7 MPa: 1373.8 N push, 1233.1 N pull. The theoretical peak at 1.0 MPa is 200.1 kgf. It runs on 0.15-1.0 MPa (22-145 psi) air filtered to 40 um at 30-800 mm/s.
Yes. The magnet is fitted at the factory as standard equipment, so CMSG, DMSG or EMSG reed switches snap onto the barrel for end-of-stroke or mid-travel sensing without ordering a magnetised piston.
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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