Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-20S 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 MAJ20X125-20S
A built-in stop screw lets maintenance crews dial the extend stroke anywhere within a 20 mm window (effective stroke 105-125 mm), so one MAJ20X125-20S covers several fixture variants instead of one per length. Double acting throughout, it runs on 0.15-1.0 MPa (22-145 psi) shop air at 30-800 mm/s, and the piston magnet ships standard for CMSG, DMSG and EMSG switches. At 0.5 MPa the 20 mm bore pushes 157 N and pulls 131.9 N.
The riveted round body pairs a stainless-steel barrel with a 20 um hard-chrome plated rod, so it shrugs off the washdown and condensation that corrode painted minis. Fixed anti-impact bumper pads soften both stroke ends; they only decelerate - an adjustable cushion belongs to the MAC family. For sizing, budget about 94 N of real work at 0.5 MPa instead of the full rating, which is roughly 8 kg lifted vertically at a 2:1 margin.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-20S |
|---|---|
| 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 MAJ20X125-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -20 | 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 MAJ20X125-20S Is Used
Conveyor part push-off
Kicking small brackets or housings off a belt lane, where a 157 N push at 0.5 MPa is ample and the 20 mm trim absorbs fixture tolerance.
Lab fixture positioning
Setting sample trays to exact depth in analytical or packaging test rigs; the stop screw is re-set per recipe within the 20 mm window.
Presence check with sensors
The magnet ships standard, so CMSG or DMSG switches confirm rod position on a gated inspection station without special ordering.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-20S the Right Cylinder?
Size both ways before committing: bore 16 delivers 100.5 N at 0.5 MPa and costs less, bore 25 delivers 245.3 N if loads grow. Keep duty near 94 N at 0.5 MPa for long seal life. The stop screw is a mechanical extend-side end stop, not a mid-stroke lock - if air is lost the rod still drifts, so nothing here holds a suspended load. FA flange, LB foot and I or Y rod knuckles cover fixings, ports are 1/8" PT, and over a 125 mm travel keep side loads off the 8 mm rod to avoid bending.
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 MAJ20X125-20S FAQ
At 0.5 MPa: 157 N push, 131.9 N pull. At 0.7 MPa: 219.8 N push, 184.7 N pull. Theoretical maximum for the 20 mm bore is 32 kgf at 1.0 MPa. For continuous duty plan on roughly 94 N of usable force at 0.5 MPa.
An external stop screw shortens the extend stroke anywhere in the ordered 20 mm window, so effective extend runs 105-125 mm; retraction stays full stroke. It is an end stop only: it never lengthens the stroke and it is not a load-holding brake - the piston still drifts on air loss. Speed range is 30-800 mm/s.
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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