Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X250-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X250-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø63mm bore and 250mm 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
- Stroke250 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 MACJ63X250-40S
250 mm of stroke, a 63 mm bore and a 40 mm extend-trim window give the MACJ63X250-40S reach plus on-site flexibility: 1557.9 N push and 1457.4 N pull at 0.5 MPa, 2181.0 N push at 0.7 MPa, and 317.7 kgf theoretical at 1.0 MPa. Variable cushions at both ends settle heavy loads gently across the 30-800 mm/s speed range; the adjuster is a hard end stop for the extend direction, not a mid-stroke lock or brake.
Inside, a two-way piston seal that stores grease runs in a stainless barrel, paired with a 20 um hard-chrome rod - a combination that outlasts painted minis outdoors and in food-plant wash zones. CMSG / DMSG / EMSG switches read position off the standard built-in magnet with no special-order piston. Derating the 1557.9 N push to 60% leaves about 935 N for the job itself, equivalent to lifting roughly 79 kg vertically with a 2:1 safety factor.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X250-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X250-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø63 mm |
| Stroke | 250 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 MACJ63X250-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 63 | Bore size in mm. |
| ×250 | 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 MACJ63X250-40S Is Used
Weld fixture clamp arm
Pivots a clamp arm through a Y knuckle with 1558 N of force; the 40 mm trim matches the fixture to varied bracket stack heights.
Washdown hatch operator
Opens inspection hatches on food machinery; the stainless barrel and 20 um hard-chrome rod stand up to daily hose-down.
Roll-gap adjuster on a small mill
Fine-tunes the extend endpoint of a roll-gap or web-tension mechanism across its 40 mm window, with cushioned seating under load.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ63X250-40S the Right Cylinder?
Sizing check: a 50 mm bore in this series makes 981.3 N at 0.5 MPa, this 63 mm barrel makes 1557.9 N, and no larger MA bore exists - beyond it you are shopping another cylinder family. With 250 mm of stroke the chrome rod forgives little, so fixture the load and keep lateral force off the front bearing. Bolt down via FA flange or LB foot; I and Y knuckles handle pivots; the magnet is already in place for CMSG / DMSG / EMSG switches. The trim screw defines the extend endpoint only and holds nothing when pressure drops.
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 MACJ63X250-40S FAQ
Full double-acting figures: 1557.9 N push and 1457.4 N pull at 0.5 MPa, 2181.0 N push and 2040.3 N pull at 0.7 MPa, 317.7 kgf theoretical at 1.0 MPa. You can shorten the extend stroke anywhere inside the 40 mm window; the adjuster acts as an end stop only and does not lock the rod if air pressure is lost.
Mount via FA flange or LB foot; I and Y rod knuckles suit pivoting loads. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, and speed 30-800 mm/s with air filtered to 40 um. The working fluid is compressed air only.
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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