Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-75S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-75S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm bore and 300mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke300 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 MAJ40X300-75S
Double acting with a wider 75 mm trim range, this bore 40 MAJ lets maintenance shorten the extend stroke on the machine instead of swapping cylinders. Push force at 0.5 MPa is 628.3 N against 527.8 N on the return side; at 0.7 MPa the push figure reaches 879.6 N. Matched to vertical duties, the rod raises roughly 64 kg at full 0.5 MPa pressure, or about 32 kg when you keep a 2:1 safety margin.
AirTAC rolls the aluminium covers and stainless block onto the steel tube, giving a riveted round body that stays slim in tight frames. Fixed anti-impact bumper pads soften stroke-end shock; they only decelerate, since true adjustable cushioning belongs to the MACJ family. The built-in magnet is standard, so CMSG / DMSG / EMSG switches need no options.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-75S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-75S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 MAJ40X300-75S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 MAJ40X300-75S Is Used
Hopper slide gate
Opens a flour hopper slide over 300 mm; the 75 mm window lets the gate seal tighter without re-plumbing the circuit.
Pallet magazine indexing
Indexes a pallet stack in a warehouse dispenser where the needed travel depth changes with pallet size.
Test rig actuator
Drives a durability test fixture whose travel limit is dialled in on the external stop screw at set-up.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-75S the Right Cylinder?
Against neighbours in the range: a 32 mm MAJ delivers 402.2 N push at 0.5 MPa while this 40 mm bore gives 628.3 N, and there is no larger MA bore to step up to. Note that the stop screw sets the extend limit only - it is not a mid-stroke lock, and a de-pressurised rod can still be pushed back. Mount via FA flange or LB foot; I and Y knuckles adapt the 16 mm rod. At 300 mm stroke, keep side loads low and guide the load externally to protect rod and seals. Port is 1/8" in PT, G or NPT.
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 MAJ40X300-75S FAQ
Push at 0.5 MPa is 628.3 N, pull at 0.5 MPa is 527.8 N, and at 0.7 MPa push reaches 879.6 N with 738.9 N pull. The theoretical maximum is 128.1 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-800 mm/s.
The fixed anti-impact pad is moulded into the covers and simply decelerates the piston near stroke end to cut metal-to-metal shock. It is not adjustable; if the application needs tunable cushioning, the AirTAC MACJ range is the family to check.
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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