Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X75-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X75-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø20mm 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.
- BoreØ20 mm
- Stroke75 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM8×1.25
- 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 MAJ20X75-40S
Few small-bore minis offer a 40 mm adjustment span - the MAJ20X75-40S does, letting one cylinder cover several station depths on the same fixture by turning the external stop screw. The double-acting 20 mm bore pushes 157 N and returns 131.9 N at 0.5 MPa; at 0.7 MPa push reaches 219.8 N. Around 94 N of that is a sensible continuous workload.
Construction stays classic MA: stainless tube, rolled aluminium covers, hard-chrome plated rod, riveted into a slim round body that slots in where profile cylinders cannot. Fixed anti-impact pads quiet both stroke ends - cushion adjustment lives in the MACJ range, not here. The magnet is standard equipment, ready for CMSG, DMSG or EMSG sensing, and vertical lift works out near 8 kg when you keep a 2:1 margin.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X75-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X75-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 75 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 300 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MAJ20X75-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X75-40S Is Used
Multi-SKU case stop on a shrink wrapper
One stop pin settable across a 40 mm spread handles different case heights without change parts.
Lid press on a coffee capsule tray
Adjustable depth seats snap-lids uniformly; 157 N presses firm without crushing thin trays.
Gate hold-back on a paint line conveyor
The stainless barrel and chrome rod shrug off paint mist and weekly washdown at the stop station.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X75-40S the Right Cylinder?
Force ladder at 0.5 MPa push: 100.5 N (16 mm bore), 157 N (this 20 mm), 245.3 N (25 mm) - pick by load, not by bore size. The 40 mm window trims the extend stroke only and acts as a hard stop, not a brake; on air loss the rod still moves, so lock the line for suspended loads. Choose an FA flange or LB foot, add an I or Y knuckle if the tooling swings, and note the 1/8" port with M8x1.25 rod thread.
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 MAJ20X75-40S FAQ
Push 157 N, pull 131.9 N at 0.5 MPa; push 219.8 N and pull 184.7 N at 0.7 MPa; theoretical ceiling about 32 kgf at 1.0 MPa. Stroke is 75 mm with a 40 mm trim window, speed 30-800 mm/s, supply 0.15-1.0 MPa (22-145 psi).
Included as standard on every MA-series cylinder, so CMSG, DMSG and EMSG switches mount straight onto the barrel for end-of-stroke or intermediate position feedback - no special piston order required.
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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