Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X150-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X150-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø20mm bore and 150mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ20 mm
- Stroke150 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 MAJ20X150-40S
Tune the extend stroke on the machine instead of re-piping a new cylinder: an external stop screw on the MAJ20X150-40S trims the 150 mm extend travel anywhere within a 40 mm window, while the double-acting piston still retracts fully under air. At 0.5 MPa the 20 mm bore pushes 157 N and pulls 132 N; at 0.7 MPa push rises to 220 N.
The riveted round body pairs a stainless-steel barrel with a hard-chrome plated 8 mm rod, so damp washdown corners and light outdoor duty do not chew up a painted mini. Every unit ships with the magnet built in, so CMSG, DMSG or EMSG switches clip straight on. A fixed anti-impact pad softens each stroke end, and with roughly 94 N left for real work at 0.5 MPa after a 0.6 margin, small guides and gates move with headroom.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X150-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X150-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 150 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 MAJ20X150-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×150 | 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 MAJ20X150-40S Is Used
Conveyor diverter gate
Swing or push small cartons between lanes on a packaging conveyor; the 40 mm trim window lets line staff dial the gate throw to the carton size without changing cylinders.
Lab dispenser stroke stop
Set a repeatable dispensing or sampling depth in analytical equipment, trimming extend travel within 40 mm so the probe stops at the same vial position every cycle.
Fixture clamp on a drill jig
Clamp thin aluminium sheet in a drill jig; 157 N at 0.5 MPa holds light parts while the stainless barrel shrugs off cutting-fluid mist.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X150-40S the Right Cylinder?
Compare by force first: the 16 mm bore manages about 100 N at 0.5 MPa, so if your load needs the 20 mm bore's 157 N you are already in the right class; step up to the 25 mm bore (245 N at 0.5 MPa) only when mass or friction climbs. The stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock - if air is lost the piston can still drift, so clamp or latch separately where holding matters. FA flange and LB foot bases plus I and Y rod knuckles cover most small fixtures, and at 150 mm travel keep side loads off the rod or guide them externally. Run it on 0.15-1.0 MPa (22-145 psi) filtered air at 30-800 mm/s.
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 MAJ20X150-40S FAQ
At 0.5 MPa the 20 mm bore gives 157 N push and 132 N pull; at 0.7 MPa that becomes 220 N push and 185 N pull. The theoretical ceiling is about 32 kgf at 1.0 MPa. Extend travel is 150 mm, trimmed up to 40 mm by the external stop screw, with an 8 mm rod on M8x1.25 male thread and 1/8" ports.
No. The magnet is standard on every MA-series cylinder, so AirTAC CMSG, DMSG and EMSG reed or electronic switches mount directly on the stainless barrel for end-of-stroke or intermediate signals - no special-order piston, no added wait.
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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