Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-50S
The AirTAC MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-50S is a genuine double acting, double rod, 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, double rod, 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 MACJ40X250-50S
Built for jobs where the final approach keeps changing, the MACJ40X250-50S carries a 50 mm extend-stroke trim window on a 250 mm base stroke. Double action plus twin variable air cushions tame end-of-stroke shock at 30-800 mm/s across 0.15-1.0 MPa (22-145 psi).
AirTAC rolls the aluminium covers onto a stainless tube, so the body stands up to rinsing and humidity where painted minis pit. Position feedback needs no options: the magnet ships inside, ready for CMSG, DMSG and EMSG switches.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-50S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-50S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting, double rod, 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 | Force (both ways) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 kgf |
MAJ / MACJ are double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
Model Code: Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-50S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -50 | 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 (double rod, 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 MACJ40X250-50S Is Used
Sample tray indexing
Moving labelled trays between lab stations: 528 N pull retracts the loaded carriage and the 50 mm trim absorbs tray-height differences.
Bottle lane gating
Beverage lines rinse down daily; the stainless barrel takes the wash while 628 N at 0.5 MPa swings the lane diverter all shift.
Fixture clamp slide
Sliding clamps over machined castings, with the cushions letting operators push cycle speed past 500 mm/s without end-of-stroke bang.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-50S the Right Cylinder?
Bore 32 gives 402 N at 0.5 MPa if the job is lighter and bore 50 offers 981 N when you need more muscle; this model's 628 N covers the middle. Remember the trim screw is an extend-side stop only and holds nothing if supply air drops. Choose FA flange or LB foot mounting, bolt on I or Y knuckles for pivoting loads, and pick sensors from the CMSG / DMSG / EMSG range that read the standard magnet. A 250 mm stroke is long for a mini, so align carefully or add external guides to protect the rod.
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 MACJ40X250-50S FAQ
The 50 mm adjust window trims extend travel on site within the ordered 250 mm stroke. Note the stop does not lock the load, so back-drifting is possible on air loss. Operating band is 0.15-1.0 MPa (22-145 psi) at 30-800 mm/s.
The barrel is a stainless steel tube with the aluminium covers rolled on, and the 16 mm rod carries a 20 um hard-chrome plate. That combination resists rinse-down and condensation far better than painted or bare-aluminium minis, which is why bottling and washdown cells specify it.
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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