Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X15-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X15-20S is a genuine double acting, adjustable stroke + cushion 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. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ20 mm
- Stroke15 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
- 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X15-20S
Installation tolerance is where this model earns its keep: the MACJ20X15-20S carries a 20 mm adjustable window, so the extend stroke can be shortened anywhere within that range after the cylinder is mounted, air-cushioned at both ends and double-acting throughout. The 20 mm bore produces 157 N of push at 0.5 MPa, which on a vertical axis lifts about 8 kg with a comfortable 2:1 margin for a light gate or lid.
Construction is the classic MA round body: stainless-steel barrel, 20 um hard-chrome plated rod, and aluminium covers rolled on with a stainless block for a sealed, riveted package. Both end cushions are adjustable, so you can trade a little cycle time for quiet, shock-free parking, and the built-in magnet works with CMSG, DMSG and EMSG switches out of the box.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X15-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X15-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 15 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| 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 | Variable air cushion, both ends |
| 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X15-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X15-20S Is Used
Dowel-pin press into hinge knuckles
A bench press nose seats small dowels in cabinet hinge knuckles; the 20 mm window absorbs fixture tolerance so the stroke ends flush every time, backed by 157 N of push at 0.5 MPa.
Lens polishing head indexing
On an optical bench, the short adjustable stroke lowers a lap head onto small lenses; cushioned ends protect the delicate contact, and the standard magnet flags head-up and head-down.
Capsule gate on a counting chute
A light swing gate diverts capsule batches between chutes; the trim range dials the gate travel exactly, and 8 kg-class vertical lift capacity leaves ample headroom.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X15-20S the Right Cylinder?
Bore 16 is the step down at 100.5 N push and 86.4 N pull at 0.5 MPa; bore 25 is the step up at 245.3 N push if your part weight or clamp force grows. Note that the adjuster is purely a mechanical end stop for the extend direction - on air loss the piston still drifts, so add a separate lock if holding is critical. FA flange or LB foot mounting suits bracket-built machines, and the standard magnet covers sensing with no upgrade.
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 On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X15-20S 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 force is 32.0 kgf at 1.0 MPa. It runs on 0.15-1.0 MPa (22-145 psi) filtered air, tolerates 1.5 MPa (215 psi) proof pressure, and speeds of 30-800 mm/s.
The stop screw built into the head shortens the extend stroke anywhere inside the ordered 20 mm window, letting you match the cylinder to real fixture geometry on site. It is a position stop only, not a load-holding brake - if air pressure drops, the piston can still move, so use a separate locking solution where loads must be held.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
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