Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X175-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X175-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø20mm bore and 175mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ20 mm
- Stroke175 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 MAJ20X175-40S
A double-acting round-body mini cylinder with an externally adjustable extend stroke: the stop screw on this MAJ20X175-40S lets you shorten the 175 mm stroke by up to 40 mm without touching the cylinder internals. Air drives the rod both ways at 30-800 mm/s, and fixed anti-impact bumper pads soften each stroke end. At 0.5 MPa the bore 20 piston delivers 157 N on the push stroke, a class suited to gates, chutes and light clamping.
The riveted stainless barrel and hard-chrome plated Dia 8 rod shrug off mild corrosion far better than painted-steel minis, so damp washdown corners and outdoor frames are realistic homes for it. Since roughly 60 percent of the 157 N rating should do real work, plan continuous duty around 94 N and you keep a healthy margin. The magnet is built in as standard, so CMSG, DMSG or EMSG switches clip straight on.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X175-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X175-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 175 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 MAJ20X175-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×175 | 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 MAJ20X175-40S Is Used
Bottling line reject gate
A 175 mm stroke with a 40 mm trim covers push-off of an under-filled bottle into a reject chute, with the stop screw dialing the exact throw.
Snap-fit assembly press
Seat light caps and bushings in jig work; 157 N push at 0.5 MPa (219.8 N at 0.7 MPa) matches click-fit plastic assemblies.
Chute diverter flap
Flip a gravity chute between two bins; the 40 mm window sets the flap throw precisely and the stainless barrel tolerates dusty product flow.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X175-40S the Right Cylinder?
Compare at 0.5 MPa: the 16 mm bore pushes 100.5 N and the 25 mm bore pushes 245.3 N, so bore 20 and its 157 N sit squarely in the light-clamp and gate zone. Step to MAJ25 only when loads approach 200 N. The -40 adjuster is a mechanical end stop for extension alone, not a mid-stroke lock - on air loss the rod still drifts, so support the load or park it on a physical stop.
Mount with an FA flange or LB foot, add I or Y rod knuckles where the linkage needs it, and feed 0.15-1.0 MPa (22-145 psi) through the 1/8" port. At 175 mm stroke, keep side loads off the Dia 8 rod by guiding them externally.
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 MAJ20X175-40S FAQ
At 0.5 MPa the bore 20 piston pushes 157 N and pulls 131.9 N; at 0.7 MPa those figures rise to 219.8 N push and 184.7 N pull. Theoretical maximum at 1.0 MPa is 32 kgf. It is double-acting, runs 30-800 mm/s on air filtered to 40 um, accepts 0.15-1.0 MPa (22-145 psi), and the extend stroke trims up to 40 mm via the external stop screw.
No. The MAJ carries fixed anti-impact bumper pads that only soften the hit at each end of travel; for an adjustable air cushion you would move to the MACJ family. The bumpers work in both directions and need no setting or air line.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
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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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