Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X450-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X450-40S 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 MACJ50X450-40S
Need 450 mm of travel but want to fine-tune where the rod stops? The MACJ50X450-40S trims its extend stroke anywhere inside a 40 mm window with an external stop screw, while variable air cushions at both ends let heavier loads land soft across the 30-800 mm/s speed band. This double-acting 50 mm bore pushes 981 N at 0.5 MPa.
That rating supports about 589 N of continuous work after a 60% derate - enough to lift near 100 kg vertically, or 50 kg with a 2:1 safety factor. Inside, a two-way seal stores grease in the piston groove; outside, the stainless tube, chrome-plated carbon rod and rolled aluminium covers resist the corrosion that kills painted mini bodies in damp cells.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X450-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X450-40S |
|---|---|
| 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 MACJ50X450-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×450 | 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 MACJ50X450-40S Is Used
Glue head retract on a corrugator
Trim the extend stop within the 40 mm window to set glue-head dwell per board grade, with about 589 N of derated push holding the head square against the panel.
Scrap ram at a stamping press
Sweeps skeletons and offcuts into the drop chute; the 450 mm stroke clears a full sheet width and the variable cushion stops the ram slamming into the back cover.
Tray shuttle in a cold-store ASRS
The stainless barrel and chrome-plated rod stand up to condensation in chill zones, and the built-in magnet feeds CMSG switches for shuttle position checks.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X450-40S the Right Cylinder?
Compare bore 40 (628 N push at 0.5 MPa) for lighter loads, or bore 63 (1558 N) to double the force. The 40 mm window shortens the extend stroke only - it never extends past 450 mm - and it is not a load-holding brake; expect drift if air is lost, so add a supply valve where holding matters. Pair FA or LB mounts with I or Y knuckles; the magnet for CMSG, DMSG and EMSG switches is already in the piston.
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 MACJ50X450-40S FAQ
Push and pull at 0.5 MPa are 981 N and 881 N; at 0.7 MPa they rise to 1374 N and 1233 N. At the theoretical 1.0 MPa ceiling the bore reaches 200 kgf. Pressure range is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof test, and speed runs 30-800 mm/s on 40 um filtered air.
A valve at each cover bleeds the trapped air that decelerates the piston, so you set the cushion length to match load and speed. With a 16 mm rod over a 450 mm stroke, also keep the load externally guided - do not let the cylinder carry side load, or the rod will bend over the long reach.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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