Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X300-30S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X300-30S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 300mm 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
- Stroke300 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 MACJ20X300-30S
For jobs that need reach, the MACJ20X300-30S pairs a 300 mm stroke with AirTAC's adjustable-stroke MACJ design: double-acting power in both directions, an external stop screw that shortens extend travel within the 30 mm ordered window, and variable air cushions at both ends. Push force is 157 N at 0.5 MPa on this 20 mm bore.
Because the stainless barrel and hard-chrome rod resist corrosion, the cylinder keeps sealing reliably in humid or lightly washed areas where painted minis pit. Sized with headroom it handles about 94 N of continuous work at 0.5 MPa, or lifts roughly 8 kg vertically at a 2:1 safety factor.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X300-30S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X300-30S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 300 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 MACJ20X300-30S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×300 | 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 MACJ20X300-30S Is Used
Conveyor diverter gate
Pushes a diverter across a belt lane to route cartons; 157 N at 0.5 MPa moves light gates briskly at up to 800 mm/s.
Sliding guard door
Opens a machine guard over 300 mm of travel; the 30 mm trim sets a repeatable partial-opening position for loading parts.
Fill nozzle lift
Raises a filling nozzle clear of an open drum between cycles, lifting about 8 kg vertically with margin in reserve.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X300-30S the Right Cylinder?
Bore 16 tops out at 100.5 N push at 0.5 MPa and bore 25 reaches 245.3 N, so this 20 mm barrel sits between them at 157 N. Operating band is 0.15-1.0 MPa (22-145 psi) with 30-800 mm/s speed. On 300 mm of travel, guide the load or keep side forces low - the slim 8 mm rod will bend under lateral loads.
Note the trim screw acts as an extend end stop only; it will not hold position if air pressure drops. Mount with FA flange, LB foot, or I and Y knuckles; the built-in magnet pairs with CMSG / DMSG / EMSG switches out of the box.
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 MACJ20X300-30S FAQ
At 0.5 MPa the bore 20 piston pushes 157 N and retracts with 131.9 N; at 0.7 MPa that becomes 219.8 N push and 184.7 N pull. Maximum theoretical force is 32 kgf at 1.0 MPa, and ports are 1/8".
The riveted stainless round barrel plus a hard-chrome plated carbon-steel rod shrug off splash, humidity and light washing far better than painted or bare-aluminium minis. For aggressive chemical washdown, protect the aluminium covers as well.
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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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