Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X20-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X20-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 20mm 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
- Stroke20 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 MACJ20X20-20S
Here the whole stroke is your adjustment band: on the MACJ20X20-20S the 20 mm extend stroke can be wound down across its entire 20 mm window, giving near-zero to full travel from one catalog part. It stays double-acting with variable cushions at both ends, so the last millimetres of a 157 N push at 0.5 MPa land soft even at speed.
Construction is the MA-series signature - stainless round tube, rolled aluminium covers, and a carbon-steel rod hard-chrome plated to 20 um against corrosion and scoring. The magnet comes built in as standard, so CMSG / DMSG / EMSG switches drop onto the barrel the day you install it. As a working figure, expect about 94 N of real push at 0.5 MPa, equivalent to raising roughly 8 kg vertically.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X20-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X20-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 20 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 MACJ20X20-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×20 | 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 MACJ20X20-20S Is Used
Small gate latch actuation
Cycling a latch or locking pin on packaging machinery; the full-stroke trim window lets maintenance retune the latch throw as parts wear.
Box-flap tucker
Folding flaps on small cartons needs a crisp 20 mm push; at 157 N (about 94 N working) the bore 20 piston does it without oversizing the machine.
Pick-slide indexing on an assembly dial
A short cushioned advance seats parts into nests; DMSG switches on the standard magnet confirm both end positions each cycle.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X20-20S the Right Cylinder?
Bore 20 sits neatly between the MACJ16 (100.5 N push at 0.5 MPa) and the MACJ25 (245.3 N); pick it when loads land in the 90-150 N working band. The trim screw shortens only the extend stroke and acts purely as a stop - it will not hold a load against gravity if the air fails, so fit a check or shut-off valve for that duty. Choose the FA flange for face mounting or the LB foot for base mounting; the standard magnet means position feedback needs no special piston order.
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 MACJ20X20-20S FAQ
For this 20 mm bore: 157.0 N push and 131.9 N pull at 0.5 MPa, 219.8 N push and 184.7 N pull at 0.7 MPa, and a 32.0 kgf theoretical maximum at 1.0 MPa. Keep supply between 0.15-1.0 MPa (22-145 psi) and rod speed between 30-800 mm/s for best seal life.
Yes - the external stop screw can trim the 20 mm extend stroke across the whole 20 mm window, and the variable air cushion still decelerates the piston at whatever end position you set. Remember the screw is a stop, not a brake: with air removed the rod can still be displaced, so do not rely on it to arrest a load.
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Standard models are processed and dispatched in 3-5 business days.
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