Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X70-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X70-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø32mm bore and 70mm 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.
- BoreØ32 mm
- Stroke70 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM10×1.25
- 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 MACJ32X70-40S
A 40 mm trim window makes the MACJ32X70-40S the flexible pick of this bore: the 70 mm extend stroke adjusts anywhere down to 30 mm, and a variable air cushion at both ends dials out shock so faster cycles stay quiet. Double-acting throughout, it delivers 402 N of push and 346 N of pull at 0.5 MPa, reaching 563 N at 0.7 MPa on a 0.15-1.0 MPa (22-145 psi) supply.
Build quality is the quiet advantage: a stainless-steel barrel riveted to aluminium-alloy covers, with a 20 um hard-chrome rod that resists corrosion in damp or rinsed-down spots. The piston magnet is standard, pairing with CMSG, DMSG and EMSG switches. Practical sizing: count on roughly 241 N of real work at 0.5 MPa, and halve the 41 kg theoretical vertical lift for a 2:1 margin - about 20 kg.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X70-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X70-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 70 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | 484 N |
| Max (@1.0 MPa) | 82 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 MACJ32X70-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 32 | Bore size in mm. |
| ×70 | Stroke length in mm. |
| -40 | 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 MACJ32X70-40S Is Used
Tray-sealer lid press
Presses lids onto ready-meal trays in a washdown area; the stainless barrel and hard-chrome rod stand up to rinse water that swells painted mini bodies.
Sortation spur diverter
Diverts cartons onto a warehouse spur conveyor; the wide 40 mm window covers several lane widths with a single cylinder stock item.
Fatigue test actuator
Drives a bench fatigue rig through 30-70 mm cycles at up to 800 mm/s; end cushions protect the load cell from impact at each reversal.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X70-40S the Right Cylinder?
Bore 25 gives 245 N push at 0.5 MPa and bore 40 gives 628 N, so bore 32 at 402 N is the mid choice for gates, presses and lifts in this class. Remember the stop screw is a stroke limiter, not a brake: with no air the piston still moves, so the trim must never be trusted to hold a load.
Choose FA flange or LB foot mounting, pair with an I or Y knuckle for swinging loads, and the built-in magnet accepts CMSG / DMSG / EMSG switches as standard. Ports are 1/8" and the rod thread is M10x1.25.
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 MACJ32X70-40S FAQ
Yes: 402.2 N push and 345.6 N pull at 0.5 MPa; 563.0 N push and 483.8 N pull at 0.7 MPa; 82 kgf theoretical maximum at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi) with proof at 1.5 MPa (215 psi).
No. Every MACJ carries a built-in magnet as standard, so CMSG, DMSG and EMSG switches drop straight onto the stainless barrel - no special-order piston and no surcharge.
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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