Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X75-30S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X75-30S 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 MACJ40X75-30S
A compact round-body actuator for stations that need less reach than the machine plate allows: the MACJ40X75-30S is double acting, cushions air at both ends and carries a 30 mm adjustable-stroke window, so the extend stop can be wound in on site instead of re-ordering a shorter cylinder.
Behind the covers sits a stainless-steel barrel riveted to aluminium end caps, with a hard-chrome plated 16 mm rod that tolerates washdown and damp air. At 0.5 MPa the piston extends with 628.3 N; keep real work near 377 N for margin, and count on about 32 kg of vertical lift at a 2:1 factor. Speeds span 30 to 800 mm/s across a 0.15-1.0 MPa (22-145 psi) supply.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X75-30S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X75-30S |
|---|---|
| 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 MACJ40X75-30S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 MACJ40X75-30S Is Used
Press feeder ejector
Eject stamped clips from a progressive die every cycle; 628 N at 0.5 MPa clears thin sheet without the 40 mm bore over-powering the tooling.
Carton push-off at a divert
Knock single cartons off a roller conveyor into a chute; trim the extend stroke by up to 30 mm so the rod never fouls the guard rail.
Dial-table retraction check
With the standard magnet and a CMSG switch, confirm the probe pulled back inside the 30 mm window before the rotary index starts.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X75-30S the Right Cylinder?
Compare bores before committing: a MACJ32 pushes 402.2 N at 0.5 MPa for lighter work, while a MACJ50 reaches 981.3 N for heavier tooling. The trim screw on this model is an extend stop only, not a load brake - lose air and the rod will drift, so hold the load with a valve circuit or external hard stops. FA flange and LB foot mountings plus I and Y knuckles cover most fixture styles, the built-in magnet pairs with CMSG, DMSG or EMSG switches, and the 75 mm stroke sits far inside the 500 mm standard limit for bore 40. Guard the 16 mm rod against side loads if tooling overhangs.
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 MACJ40X75-30S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa those rise to 879.6 N push and 738.9 N pull. The theoretical maximum is 128.1 kgf at 1.0 MPa. Supply pressure runs 0.15-1.0 MPa (22-145 psi), speed 30 to 800 mm/s, with extend travel trimmed within the 30 mm window.
Every unit ships with the magnet already fitted, so CMSG, DMSG or EMSG switches click straight onto the barrel without a special piston order. The air cushion at both ends is variable - turn it up when a heavy carriage reaches the 30 mm trimmed stop so the covers never take a hammering.
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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