Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-75S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-75S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 250mm stroke, 1/8" 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.
- BoreØ40 mm
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM12×1.25
- 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 MACJ40X250-75S
A 75 mm adjustment window gives the MACJ40X250-75S the widest trim range in this bore, so one cylinder absorbs product-change tweaks on a 250 mm stroke. It stays double-acting with variable air cushioning at each end, fed 0.15-1.0 MPa (22-145 psi) and running 30-800 mm/s. At 0.5 MPa expect 628 N forward and 528 N back; 880 N forward at 0.7 MPa, with a 128 kgf theoretical maximum.
Construction follows the classic MA recipe: a stainless round barrel with a 16 mm hard-chrome rod, covers riveted on for a sealed, washdown-friendly package. Every unit includes the position magnet for CMSG, DMSG or EMSG sensing. For sizing, keep continuous work near 377 N at 0.5 MPa, and count on roughly 32 kg of vertical lifting capacity once margin is applied.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-75S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-75S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MACJ40X250-75S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -75 | 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 MACJ40X250-75S Is Used
Case squaring push
Squaring cartons before taping: the 75 mm window handles mixed case heights without swapping cylinders between SKUs on the taping line.
Tote diverters
Sortation diverters kick loaded totes off a belt, and 628 N at 0.5 MPa keeps the divert rate up even with heavy warehouse loads.
Changeover rail stops
Positioning end stops on a product changeover rail, where the wide trim range replaces a drawer full of spacer blocks.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-75S the Right Cylinder?
If 628 N at 0.5 MPa is more than the task needs, bore 32 does 402 N; if it falls short, bore 50 pushes 981 N. The 75 mm window only shortens the extend stroke and acts as a stop, never as a brake against pressure loss. FA and LB mounts suit fixed machines, while I and Y knuckles handle swivelling loads; the magnet for CMSG, DMSG and EMSG switches is already inside. Long 250 mm strokes magnify misalignment, so guide the load or keep it free of side force.
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 MACJ40X250-75S FAQ
Double-acting with a 75 mm adjustable extend window and variable cushioning at both ends. Forces: 628 N push and 528 N pull at 0.5 MPa, 880 N push at 0.7 MPa, and 128 kgf theoretical maximum. It breathes 0.15-1.0 MPa (22-145 psi) of filtered air, moves at 30-800 mm/s, and carries a standard magnet for CMSG, DMSG or EMSG switches.
FA flange and LB foot bolt the body down; I and Y rod knuckles connect pivoting tooling. The adjuster is an extend-side end stop, not a mid-stroke holder, so use a CMSG / DMSG / EMSG switch on the built-in magnet to confirm position rather than relying on the screw.
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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