Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X125-75S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X125-75S is a genuine double acting, adjustable stroke 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.
- BoreØ40 mm
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM12×1.25
- CushionFixed anti-impact bumper pads
- 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X125-75S
Trim latitude peaks at 75 mm on this version of the 125 mm MAJ40, the widest window offered for this bore. The external stop screw lets commissioning engineers pull the extend stroke back within 75 mm of range while double-acting air still supplies 628.3 N of push and 527.8 N of pull at 0.5 MPa. As a sizing shortcut, count on about 377 N of real push at 0.5 MPa, enough to raise a 32 kg load vertically with a 2:1 safety factor.
Mounting flexibility covers an FA flange, an LB foot, plus I and Y rod knuckles for pivoting tooling. The stainless round barrel and hard-chromed rod resist mild corrosion, and the riveted covers keep the body slim for tight frames. Speed runs 30-800 mm/s between -20 and +70 C, and fixed bumper pads damp the stroke ends - they decelerate, but are not the adjustable air cushion you would find on the MAC cushioned series.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X125-75S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X125-75S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting, adjustable stroke |
| 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 | Fixed anti-impact bumper pads |
| 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X125-75S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X125-75S Is Used
Robotic gripper wrist clamp
A pick-and-place wrist clamps 20 kg castings; the 75 mm window lets the same cylinder serve two mold sizes without hardware changes.
Bale-tie compactor foot
Recycling lines press cardboard bales with 628.3 N of push at 0.5 MPa while the stop screw sets compaction height per bale recipe.
Oven-door damper link
A food oven's vent damper is stroked open by the cylinder, trimmed to 60 mm of travel via the 75 mm window, and monitored by a CMSG switch on the barrel.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X125-75S the Right Cylinder?
Sizing check: a 32 mm bore gives 402.2 N at 0.5 MPa; this 40 mm bore doubles the reserve at 628.3 N, so pick the 32 mm model when 400 N is plenty and this one when a stalled load must still break free. The 75 mm adjuster is purely an extend-side mechanical limit - under air failure the piston can be pushed back, so hanging or clamped loads need their own lock. Order FA or LB mounting, pair the standard piston magnet with CMSG, DMSG or EMSG switches for stroke confirmation, and watch rod bending: at 125 mm of stroke keep the payload guided so the 16 mm chrome rod sees thrust, not side force.
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 Bumper models: keep speed within the rated range.
- check Installation by qualified personnel per AirTAC docs.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X125-75S FAQ
Push 628.3 N and pull 527.8 N at 0.5 MPa; push 879.6 N and pull 738.9 N at 0.7 MPa; 128.1 kgf theoretical maximum at 1.0 MPa. Bore 40 mm, rod 16 mm with M12x1.25 thread, 1/8" port, pressure 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, extend stroke trimmed within 75 mm.
If final stroke length is unknown at ordering time or several products share the station, the 75 mm window gives the widest on-site latitude in this bore class. The stop screw sets extension mechanically and repeatably, while the standard magnet plus CMSG / DMSG / EMSG switches confirm position. Bear in mind it limits stroke only; it is not a load-holding brake.
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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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