Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X40-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X40-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø63mm bore and 40mm 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
- Stroke40 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 MACJ63X40-20S
Short-stroke work with on-site tuning: the MACJ63X40-20S pairs a 40 mm extend throw with a 20 mm trim window, double-acting power in both directions and a variable air cushion at each end. The 63 mm bore belongs to the strongest class in the MA range, pushing 1557.9 N and pulling 1457.4 N at 0.5 MPa.
Keep a reserve and the same bore still delivers about 935 N of real work at 0.5 MPa, or holds roughly 79 kg in a vertical lift at a 2:1 margin. The barrel is a rolled stainless tube with a hard-chrome plated 16 mm rod, so washdown mist and outdoor damp that rust painted minis leave it alone. A magnet ships inside as standard, ready for CMSG, DMSG and EMSG switches with no piston upgrade.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X40-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X40-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø63 mm |
| Stroke | 40 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 MACJ63X40-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 63 | Bore size in mm. |
| ×40 | 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 MACJ63X40-20S Is Used
Milling fixture clamp
A 40 mm clamp throw with 20 mm of trim lets one cylinder serve fixture plates of slightly different heights; 1557.9 N at 0.5 MPa seats aluminum blocks solidly.
Capper punch on a bottling line
Drives a foil-sealing punch over the short 40 mm stroke at up to 800 mm/s, with the cushion preventing shock from cracking bottle necks.
Diverter gate pusher
Swings parcel diverter gates across a 40 mm throw; the 935 N working reserve at 0.5 MPa keeps the gate moving against belt friction.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X40-20S the Right Cylinder?
Compare before you commit: the 50 mm bore develops 981.3 N at 0.5 MPa and covers duties up to about 590 N, while 63 mm is the largest bore in the MA series, so there is nothing bigger to step up to. Supply 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s. Fix the body with an FA flange or LB foot and fit an I or Y knuckle for pivoting loads. The stop screw sets the extend endpoint only; it is not a brake, and the rod can still move if air pressure drops under load.
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 MACJ63X40-20S FAQ
At 0.5 MPa it pushes 1557.9 N and pulls 1457.4 N. At 0.7 MPa the figures rise to 2181.0 N push and 2040.3 N pull. The theoretical maximum is 317.7 kgf at 1.0 MPa. Port size is 1/4 inch and the rod thread is M14x1.5.
An external stop screw shortens the extend stroke anywhere within the 20 mm window - you set the final position on the machine without disassembly. It is an end stop, not a lock: with air removed the piston is free to move, so never rely on it to hold a suspended load.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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