Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X120-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X120-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø63mm bore and 120mm 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.
- BoreØ63 mm
- Stroke120 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 MACJ63X120-20S
Need roughly 1560 N of push but a stroke you can still fine-tune? The MACJ63X120-20S is AirTAC's 63 mm adjustable mini cylinder: double-acting with a variable air cushion at both ends, it trims its 120 mm extend stroke by up to 20 mm via the external stop screw. At 0.5 MPa you get 1557.9 N forward and 1457.4 N on retract.
For vertical work, halve the 158 kgf push figure and you can lift about 79 kg with a 2:1 margin. The two-way piston seal stores grease between service intervals, cutting maintenance on long-running machines. Tuning the cushion at each end also lets you push cycle speed past the point where a plain bumper mini would start hammering its covers.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X120-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X120-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø63 mm |
| Stroke | 120 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1458 N |
| 0.7 MPa | 2182 N | 2041 N |
| Max (@1.0 MPa) | 318 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 MACJ63X120-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 63 | Bore size in mm. |
| ×120 | 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 MACJ63X120-20S Is Used
Case squaring on a shrink wrapper
Squares leaning cartons before sealing; the 20 mm window absorbs wrapper-to-wrapper spacing changes without re-machining brackets.
Tray ram in a bottling QC station
Presses sample trays down where washdown mist kills painted minis; the riveted stainless body keeps sealing after repeated hose-downs.
Reject pusher on a checkweigher
Culls off-spec packs at up to 800 mm/s; the variable cushion stops the 120 mm throw without banging the pusher head.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X120-20S the Right Cylinder?
The next size down, the 50 mm bore, delivers 981.3 N at 0.5 MPa - if your load sits under about 590 N of real work, save air and money there. Above roughly 935 N of usable force, this 63 mm bore is the right call, since it is the largest the MA range offers. The adjuster holds position only while air holds; on pressure loss the piston drifts, so never rely on it as a brake under a suspended load.
FA flange or LB foot mounting plus optional I and Y rod knuckles cover most machine frames, and the standard magnet pairs with CMSG or EMSG switches for end-of-stroke confirmation. Ports are 1/4" on both covers.
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 MACJ63X120-20S FAQ
Push is 1557.9 N at 0.5 MPa (2181.0 N at 0.7 MPa), pull is 1457.4 N (2040.3 N at 0.7 MPa), and theoretical peak is 317.7 kgf at 1.0 MPa. It runs on 0.15-1.0 MPa (22-145 psi), tolerates 1.5 MPa (215 psi) proof, and travels 30-800 mm/s over a 120 mm stroke with a 20 mm trim window.
The stop screw sets where the extend stroke ends within the ordered 20 mm window - a mechanical limit you set once. The variable air cushion is a pneumatic damper at both ends that you tune to soften deceleration. One sets the position, the other protects it; neither locks the rod if air pressure is lost.
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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