Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X75-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X75-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 75mm 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
- Stroke75 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 MACJ40X75-40S
Adjustable on the fly: a stop screw on the MACJ40X75-40S sets the extend stroke anywhere inside a 40 mm window below the 75 mm ordered travel, while the variable air cushion at each end soaks up deceleration shock so faster cycling stays practical.
The rolled stainless barrel and 20 um hard-chrome rod laugh off damp workshops and periodic washdown. At 0.5 MPa the bore 40 piston makes about 628 N of push, of which roughly 377 N is a sane working figure; hung vertically it lifts about 64 kg, or 32 kg kept to a 2:1 margin. Speed 30-800 mm/s on 0.15-1.0 MPa (22-145 psi) of clean air.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X75-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X75-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 75 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 MACJ40X75-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 MACJ40X75-40S Is Used
CNC fixture clamping
Robot-tending cells clamp raw aluminum blanks before pickup; the 40 mm trim absorbs fixture tolerance differences between part families, backed by 628 N at 0.5 MPa.
Die ejector throw trim
Small press shops set ejector throw per die height by turning the stop screw, replacing shim packs, while the 739 N retract at 0.7 MPa snaps the ejector home.
Tray lane diverter
On a bakery tray line, switching trays between proofing and cooling lanes uses the trimmed stroke to match lane pitch; the both-end cushion keeps the gate quiet at speed.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X75-40S the Right Cylinder?
Next sizes down and up: a 25 mm bore of the series delivers about 245 N at 0.5 MPa, the 50 mm bore about 981 N, so this 40 mm at 628 N is the mid choice. Remember the stroke adjuster positions the piston at end of travel only - it is not a brake and will not clamp a load if air pressure drops.
Fix it by LB foot or FA flange; I and Y knuckles suit pivoting links. Because the magnet ships fitted, a CMSG / DMSG / EMSG switch slides on for sensing without any special-order piston.
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 MACJ40X75-40S FAQ
Push 628 N and pull 528 N at 0.5 MPa; 880 N push and 739 N pull at 0.7 MPa; about 128 kgf theoretical ceiling at 1.0 MPa. Stroke adjusts within a 40 mm window, rod speed spans 30-800 mm/s, and the ports are 1/8".
The air cushion at each end is adjustable, so the piston decelerates just before contact. That matters when cycling at the top of the 30-800 mm/s range or when the load changes between part batches - the covers stop getting hammered.
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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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