Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X15-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X15-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø20mm bore and 15mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ20 mm
- Stroke15 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 MAJ20X15-20S
Repeatability on a tight footprint is the brief for this bore 20, 15 mm stroke MA-series mini cylinder. Double-acting air yields 157 N of push and 131.9 N of pull at 0.5 MPa, rising to 219.8 N and 184.7 N at 0.7 MPa, while a stop screw on the outside of the case trims the extend stroke across the ordered 20 mm window. The stainless tube, aluminium covers and stainless block are rolled together into a sealed round body that stays compact.
A magnet is fitted as standard, so a CMSG or EMSG switch confirms position without custom pistons. Fixed bumper pads cushion stroke ends; adjustable cushioning belongs to the MACJ series instead. Size on about 94 N of working force at 0.5 MPa - in vertical service that lifts a part of close to 8 kg with the margin halved.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X15-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X15-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 15 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 MAJ20X15-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×15 | 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 MAJ20X15-20S Is Used
Carousel indexing in a lab analyzer
Advancing a reagent carousel one station per test; a DMSG switch on the standard magnet verifies each index before sampling starts.
PCB carrier ejection from a test nest
Ejecting finished PCB carriers from an electronics test jig, where 15 mm is all the clearance the fixture offers and 157 N is more than enough.
Coding-head lift on an ink printer
Raising a coding head clear of a printed carton between passes; the hard-chrome rod stands up to ink mist in the print zone.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X15-20S the Right Cylinder?
Forces here bracket the class: the 16 mm bore offers 100.5 N at 0.5 MPa for lighter duties, the 25 mm offers 245.3 N when a stiffer push is needed. With only 15 mm of stroke, rod whip and bending are rarely a concern, but still align the LB foot or FA flange carefully to avoid binding. Ports are 1/8" and the rod thread is M8x1.25. The stop screw is an extend-stroke end stop rather than a brake, so plan external locking where a load must stay put on air failure.
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 MAJ20X15-20S 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 limit at 1.0 MPa is 32.0 kgf. Operating range 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, air filtered to 40 um.
FA flange or LB foot on the round body, plus I and Y rod knuckles for linkages. The 8 mm rod is threaded M8x1.25 and air ports are 1/8". The stop screw is an extend-stroke end stop, not a load-holding brake.
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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