Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-75S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-75S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 125mm 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
- Stroke125 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 MACJ40X125-75S
Cover a 50 mm stroke and everything up to 125 mm with a single order: the MACJ40X125-75S uses an external stop screw to set extend travel anywhere in that 75 mm window, and the variable air cushion adapts to each end of whichever stroke you land on. Double-acting, it delivers 628.3 N of push at 0.5 MPa.
The riveted stainless barrel and the 20 um hard-chrome plate on its 16 mm rod handle humid, wash-prone corners of a plant that corrode painted mini bodies within months. Plan real work at about 377 N (60 percent of the 0.5 MPa rating) or a vertical lift near 32 kg with a 2:1 margin; at 0.7 MPa the push ceiling is 879.6 N. Every cylinder leaves the factory with a magnet already fitted for CMSG, DMSG and EMSG switches.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-75S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-75S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 MACJ40X125-75S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 MACJ40X125-75S Is Used
Order-picking stop gate on a roller conveyor
628.3 N at 0.5 MPa stops and holds totes at the pick face; re-adjust between 50 and 125 mm as tote sizes change.
Filling-line nozzle stroke
One cylinder serves small and large containers by trimming extend travel anywhere in the 75 mm window; the cushion keeps nozzles from hammering the caps.
Repair-press bench in a food plant
The riveted stainless body tolerates daily washdown while pushing 628.3 N at 0.5 MPa for bearing and bushing work.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X125-75S the Right Cylinder?
At 628.3 N push (0.5 MPa) bore 40 covers mid-range jobs; step down to 32 mm for 402.2 N or up to 50 mm for 981.3 N if the load shifts. The wide 75 mm window makes this the version to stock when product sizes change week to week. Note that the adjuster is purely a position stop - under air loss the rod moves freely, so it will not park a hanging load. Choose FA flange or LB foot, fit an I or Y knuckle where misalignment exists (no SDB on adjustable cylinders), and support long side loads externally across the 125 mm travel.
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 MACJ40X125-75S FAQ
Push is 628.3 N and pull 527.8 N at 0.5 MPa; raise supply to 0.7 MPa and push climbs to 879.6 N with pull at 738.9 N. The theoretical maximum is 128.1 kgf at 1.0 MPa. The cylinder runs on 0.15-1.0 MPa (22-145 psi), cycles at 30-800 mm/s, and the 75 mm window sets extend stroke anywhere from 50 to 125 mm.
The barrel is stainless steel with aluminium covers riveted on, and the 16 mm rod carries a 20 um hard-chrome plate - a combination that outlasts painted bodies in washdown splash and outdoor humidity. Inside, the two-way piston seal stores grease for long life, and the variable air cushion at each end protects the covers when you cycle fast or move heavy loads.
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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