Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X30-30S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X30-30S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 30mm 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
- Stroke30 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 MACJ20X30-30S
A short-travel, double-acting mini cylinder from AirTAC's MA family: air drives the rod both ways, a stop screw trims the extend stroke anywhere inside the ordered 30 mm window, and a variable air cushion at each end soaks up impact. The 20 mm bore delivers 157 N push and 131.9 N pull at 0.5 MPa, climbing to 219.8 N at 0.7 MPa.
The riveted stainless round barrel with its hard-chrome plated rod shrugs off washdown and damp better than painted mini cylinders, so it suits food and outdoor cells. In practice budget about 94 N for real work at 0.5 MPa - roughly enough to lift an 8 kg part vertically with a 2:1 margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X30-30S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X30-30S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 30 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 MACJ20X30-30S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×30 | Stroke length in mm. |
| -30 | 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 MACJ20X30-30S Is Used
PCB ejector pin
Kicks finished circuit boards off a test nest on an SMT line, using the 30 mm travel and about 94 N of usable push.
Blister card punch
Short jab motion for scoring blister cards on a small packaging machine; the cushions keep each 30 mm cycle quiet.
Part presence probe
Confirms a machined bushing is seated in its fixture before the next operation; the built-in magnet feeds a CMSG switch.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X30-30S the Right Cylinder?
Compare by force: the smaller bore 16 MA cylinder makes 100.5 N push at 0.5 MPa, while stepping up to bore 25 buys 245.3 N. Run this one at 0.15-1.0 MPa (22-145 psi) and 30-800 mm/s. The adjust screw is an extend-stroke end stop, not a mid-stroke lock - if air is lost the piston can still drift, so add a valve or clamp where holding matters.
FA flange or LB foot mounts plus I and Y rod knuckles cover most fixturing; the standard magnet accepts CMSG, DMSG and EMSG switches with no special piston.
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 MACJ20X30-30S FAQ
At 0.5 MPa it pushes 157 N and pulls 131.9 N; at 0.7 MPa push rises to 219.8 N and pull to 184.7 N. Theoretical maximum is 32 kgf at 1.0 MPa. Working pressure spans 0.15-1.0 MPa (22-145 psi) and air connects through 1/8" ports.
No. Every MA-series cylinder ships with a magnet built into the piston as standard, so CMSG, DMSG or EMSG switches mount straight onto the stainless barrel without a special-order variant.
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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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