Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X125-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X125-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø63mm bore and 125mm 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
- Stroke125 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 MACJ63X125-40S
Where the 50 mm MA bore runs out of muscle (981.3 N push at 0.5 MPa), the 63 mm MACJ63X125-40S steps in with 1557.9 N and a theoretical peak of 317.7 kgf at 1.0 MPa. Air works both sides of the piston for double-acting motion, the extend stroke trims anywhere within a 40 mm window, and variable cushions at each end let you run 30-800 mm/s without slamming the riveted aluminium covers.
Sizing by lifting? The 0.5 MPa push converts to about 159 kgf, so with a 2:1 margin this cylinder lifts roughly 79 kg vertically, enough for a small die shoe or a loaded jig. The stainless barrel and hard-chrome 16 mm rod handle damp corners and washdown bays, and the piston magnet is standard, ready for CMSG, DMSG and EMSG switches.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X125-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X125-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø63 mm |
| Stroke | 125 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 MACJ63X125-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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 MACJ63X125-40S Is Used
Mould-core set-down
Lowers injection mould cores into position on a tool-change trolley; the 40 mm trim window compensates for different core heights.
Stamping pick-off gripper
Closes a gripper arm that lifts pressed brackets off the die, using about 935 N of realistic grip-and-hold force at 0.5 MPa.
Belt take-up tensioner
Keeps constant tension on a conveyor take-up carriage, with the air cushion damping belt surge at each end of travel.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X125-40S the Right Cylinder?
Downsize to a 50 mm bore only if 981.3 N at 0.5 MPa still moves your load; otherwise this 63 mm model is the ceiling of the MA range at 1557.9 N. Remember the stop screw is a stroke limiter, not a brake: if supply air drops, the rod floats, so support any hanging load with a valve or a counterbalance. FA flange and LB foot mounts plus I and Y knuckles cover most fixture needs, and the load should stay externally guided so bending never reaches the rod over the 125 mm travel.
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 MACJ63X125-40S FAQ
At 0.5 MPa the bore produces 1557.9 N push and 1457.4 N pull; at 0.7 MPa expect 2181.0 N push and 2040.3 N pull, and the theoretical ceiling is 317.7 kgf at 1.0 MPa. The 16 mm rod reduces the pull figures because it takes up part of the retract area.
The stop screw trims only where the extend stroke ends, while the variable air cushion at both ends still decelerates the piston inside whatever window you set. In practice you set the window with the screw, then bleed the cushion needle until the load settles quietly at 30-800 mm/s instead of ringing the cover.
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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.
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Most inquiries answered within 7-8 hours.
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