Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-50S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-50S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø20mm 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.
- BoreØ20 mm
- Stroke125 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 MAJ20X125-50S
A compact double-acting round-body cylinder whose extend stroke you can shorten on site through a 50 mm window - just turn the external stop screw, no disassembly needed. Bore 20 delivers 157 N push and 131.9 N pull at 0.5 MPa, rising to 219.8 N push at 0.7 MPa, running on 0.15-1.0 MPa (22-145 psi) filtered air at 30-800 mm/s.
The stainless barrel with a hard-chrome plated 8 mm rod shrugs off splash and humidity where painted minis rust, and the riveted aluminium covers keep the footprint tight. At 0.5 MPa plan roughly 94 N of useful work rather than the full 157 N rating. A magnet is built in as standard, so CMSG, DMSG or EMSG switches clip straight on.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-50S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-50S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 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 MAJ20X125-50S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -50 | 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 MAJ20X125-50S Is Used
Carton flap tuck station
On a case packer, trim the 125 mm extend stroke by up to 50 mm so the tuck arm clears the passing carton yet lands the flap flush at the same depth every cycle.
Small-part kick-off
Push capsules, closures or stamped parts off a narrow conveyor at the right station; 157 N at 0.5 MPa is ample for parts under 100 g.
End-of-stroke confirmation
Clip an EMSG switch on the stainless barrel to confirm the flap, gate or part actually reached the trimmed position before the next PLC step.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-50S the Right Cylinder?
Between the 100.5 N of the bore 16 MAJ16X125-50 class and the 245.3 N of the bore 25 version, this 20 mm bore suits light clamping and transfer in the 90-150 N working band at 0.5 MPa. If the load must stay put when air is lost, add an external lock or a pilot valve circuit - the stroke adjuster is a mechanical end stop, not a brake. FA flange or LB foot mounts, plus I and Y rod knuckles, cover most fixings; the air port is 1/8" and the male rod thread is M8x1.25.
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 MAJ20X125-50S FAQ
At 0.5 MPa it pushes 157 N and pulls 131.9 N; at 0.7 MPa push rises to 219.8 N (pull 184.7 N). Theoretical maximum force is 32 kgf at 1.0 MPa. Operating range is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof rating.
No. The fixed anti-impact pads at each stroke end only soften the mechanical stop; they are not adjustable cushions (that is the MACJ family). If you need cushioning plus on-site adjustability, step up to the MAC series; here the stop screw simply trims the extend stroke within the ordered 50 mm window.
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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.
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Most inquiries answered within 7-8 hours.
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