Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X80-30S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X80-30S 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 MACJ40X80-30S
Wet floors, condensation and frequent hose-downs are where the MACJ40X80-30S pulls ahead of painted-steel minis: a rolled stainless barrel with a hard-chrome carbon-steel rod will not flake or rust through. It is double acting, cushions both ends of travel, and its stop screw trims the extend stroke across a 30 mm window on site. At 0.5 MPa the 40 mm bore produces 628 N push and 528 N pull from a 0.15-1.0 MPa (22-145 psi) supply.
Because the magnet is fitted as standard equipment rather than a paid option, a CMSG, DMSG or EMSG switch turns it into a positioned actuator the day it arrives. Sizing note: expect about 377 N of dependable push at 0.5 MPa once a sensible service factor is applied to the full rating.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X80-30S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X80-30S |
|---|---|
| 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 MACJ40X80-30S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -30 | 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 MACJ40X80-30S Is Used
Glue bead depth stop on a case gluer
Set the nozzle approach within the 30 mm window so the bead lands identically on every corrugated blank.
Tote pusher on a pick-module conveyor
628 N at 0.5 MPa shoves loaded 600 mm totes across the lane, and the washdown-friendly stainless build suits the humid zone.
Coolant nozzle indexer on a CNC lathe
Aim the stream per part family by adjusting the stop screw at the machine, with no cylinder changeover between jobs.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X80-30S the Right Cylinder?
For mid-duty clamping and feeding, compare three sizes at 0.5 MPa push: 402 N on the 32 mm bore, 628 N here, 981 N on the 50 mm bore. Run 30-800 mm/s and trim the cushions until the ends go quiet. FA flange or LB foot mounting, with I and Y rod knuckles for pivoting loads; note the adjustable build carries no SDB or back-cover code. The stroke stop defines extend length only and will not hold a load if supply pressure fails, so route holding duty to a valve or a locking unit.
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 MACJ40X80-30S FAQ
Yes: 628 N push / 528 N pull at 0.5 MPa, 880 N push / 739 N pull at 0.7 MPa, and a 128 kgf theoretical maximum at 1.0 MPa. Bore 40 mm, stroke 80 mm adjustable across 30 mm, rod 16 mm hard chrome, 1/8" air port, operating pressure 0.15-1.0 MPa (22-145 psi).
Painted and plain-aluminium minis pit quickly in washdown bays, near coolants or outdoors. The MACJ's rolled stainless tube plus a 20 um hard-chrome rod layer keeps sealing surfaces true, so the same cylinder runs longer in damp, food-adjacent or outdoor positions.
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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.
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Most inquiries answered within 7-8 hours.
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