Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-10S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-10S 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 MACJ40X250-10S
Long-travel work in a compact package: with 250 mm of travel and a 10 mm on-site trim window, this MACJ40 covers long pushes - feeders, lifters, gates - from a bore only 40 mm across. The extend stroke can be shortened by up to 10 mm with the external stop screw; it cannot be lengthened beyond the ordered 250 mm. Force at 0.5 MPa is 628.3 N push and 527.8 N pull, rising to 879.6 N push at 0.7 MPa. A variable air cushion at each end absorbs the landing, so the covers survive high-speed cycling.
The barrel is stainless steel rolled onto aluminium covers, and the 16 mm carbon-steel rod carries a 20 um hard-chrome plate - a build that tolerates washdown and outdoor damp where painted minis rust. In practice expect about 377 N of usable push at 0.5 MPa; hung vertically that is roughly 64 kg at full pressure, or a 32 kg part when you keep a 2:1 reserve. The magnet is standard, so CMSG / DMSG / EMSG switches fit without options.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-10S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-10S |
|---|---|
| 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 MACJ40X250-10S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -10 | 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 MACJ40X250-10S Is Used
Lift gate on a bottling line
Raising a reject flap or gate through 250 mm; the 10 mm trim lets maintenance fine-tune the open height at the machine.
Load pusher on a pallet station
Squaring cases against a backstop before strapping; 377 N of working force squares a full layer cleanly at 30-800 mm/s.
Specimen feeder in a test rig
Advancing samples into a test head with cushioned landings at both ends of the 250 mm travel.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X250-10S the Right Cylinder?
Compare before you size: the 32 mm bore delivers 402.2 N at 0.5 MPa for lighter pushes, while the 50 mm bore gives 981.3 N for heavier loads. On a 250 mm stroke keep side loading low - guide the load externally if the moving mass is offset, since a cantilevered 16 mm rod over this travel will bend before the bore complains. FA flange and LB foot mounts, I and Y knuckles optional, porting 1/8" (PT as standard; G or NPT to order). If the load must stay put when air drops, add a locking device - the trim stop only sets the extend position and does not hold against drift.
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 MACJ40X250-10S FAQ
Push at 0.5 MPa is 628.3 N with 527.8 N on the pull side; at 0.7 MPa expect 879.6 N push and 738.9 N pull, and the theoretical ceiling is 128.1 kgf at 1.0 MPa. Derate to about 377 N for continuous work at 0.5 MPa.
Keep the load guided externally - slides, bushings or a gantry - so the 16 mm hard-chrome rod sees thrust, not bending. The variable cushion at both ends then only has to absorb axial shock, and speeds of 30-800 mm/s stay smooth.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
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