Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X80-75S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X80-75S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 80mm 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
- Stroke80 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 MACJ40X80-75S
Shorten the extend travel almost to nothing when the job calls for it: the 75 mm window on this 80 mm stroke means the stop screw can pull the working stroke down to roughly 5 mm without changing cylinders between product sizes. It stays double-acting throughout, with a variable air cushion at both ends damping the landing. Force output from the 40 mm bore is 628 N push and 528 N pull at 0.5 MPa, rising to 880 N push at 0.7 MPa - plan on about 377 N of useful work at 0.5 MPa rather than the full rating.
Construction is a riveted stainless-steel tube with a hard-chrome plated rod, a combination that keeps corrosion out of washdown areas and outdoor equipment where painted minis fail. The two-way piston seal doubles as a grease reservoir, keeping lubricant where the seal rides, while the built-in magnet accepts CMSG, DMSG or EMSG switches as standard. Speeds up to 800 mm/s stay comfortable because the cushions absorb end-of-stroke shock.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X80-75S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X80-75S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 MACJ40X80-75S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 MACJ40X80-75S Is Used
Bin pick station stops
Set different indexed stop positions for tote bins of varying depth arriving at a robotic pick cell, retuned in minutes with the stop screw.
Marker punch station
Stamp batch codes into plastic housings on a small press fixture, letting the 75 mm window match die height whenever tooling changes.
Sorting diverter gate
Flip a diverter gate on a parcel sorting conveyor between two lanes, with the cushion landing the gate quietly at high cycle rates.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X80-75S the Right Cylinder?
A MACJ25 gives 245 N push at 0.5 MPa if the load is light, while a MACJ50 lifts capacity to 981 N - this 40 mm model sits between them with the wider trim window of the pair at this stroke. The adjuster is a mechanical stop for the extend direction only; it is not a mid-stroke lock, so a suspended rod will still sink if the air supply drops. Choose FA flange or LB foot mounting, add I or Y knuckles for pivoting loads, and remember the standard piston magnet keeps switch mounting a bolt-on job.
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 MACJ40X80-75S FAQ
Push is 628 N and pull 528 N at 0.5 MPa; at 0.7 MPa the numbers are 880 N push and 739 N pull, and theoretical peak force is 128 kgf at 1.0 MPa. The cylinder is double-acting with a variable cushion at both ends, a 75 mm adjustable window across its 80 mm stroke, and works from 0.15-1.0 MPa (22-145 psi) at 30-800 mm/s.
No - the stop screw is a hard end stop that only limits the extend direction within the 75 mm window, not a brake, so the piston drifts on air loss. For position confirmation, the standard built-in magnet pairs with CMSG, DMSG or EMSG switches at the calibrated ends of travel.
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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