Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø50mm bore and 300mm stroke, 1/4" 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.
- BoreØ50 mm
- Stroke300 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM14×1.5
- 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 MACJ50X300-20S
A 50 mm bore round-body mini cylinder built to trim its extend stroke by up to 20 mm on site, the MACJ50X300-20S is double-acting with a variable air cushion at both ends. Air pushes the rod both ways, so retract work is covered too: 880.8 N pull at 0.5 MPa and 1233.1 N at 0.7 MPa against 981.3 N and 1373.8 N on the extend side. Pressure runs 0.15-1.0 MPa (22-145 psi) with speeds of 30-800 mm/s.
The stainless-steel barrel and 20 um hard-chrome plated rod shrug off washdown and damp air, an edge over painted minis in food plants or outdoor frames. For sizing, expect roughly 589 N of real work at 0.5 MPa rather than the full 981.3 N rating, and the rod will lift about 50 kg vertically once you halve the 100 kg theoretical lift for a 2:1 margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 300 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 500 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | 1234 N |
| Max (@1.0 MPa) | 200 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 MACJ50X300-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×300 | 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 MACJ50X300-20S Is Used
Packaging line stop gates
Pneumatic gate arms on a bottling conveyor that must catch different bottle sizes; the 20 mm trim window and about 589 N of working thrust hold the gate steady.
Pallet presence pushers
Push empty pallets off a roller conveyor; 981.3 N at 0.5 MPa shifts a loaded timber pallet sideways while the cushion prevents kick-back at the stop.
Sample press in a lab rig
A light clamping press for test coupons inside a corrosive fume hood, where the stainless barrel resists chemical splash better than a painted mini cylinder.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-20S the Right Cylinder?
Check both directions: bore 40 gives 628.3 N push at 0.5 MPa if 981.3 N is overkill, while bore 63 reaches 1557.9 N when you need more. The magnet ships standard, so pairing with CMSG or DMSG reed switches needs no special piston. Mount with FA flange or LB foot; I and Y rod knuckles fit the rod side. A 300 mm stroke means side loads should be guided externally, since the 16 mm rod is sized for thrust rather than bending.
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 MACJ50X300-20S FAQ
At 0.5 MPa it pushes 981.3 N and pulls 880.8 N; at 0.7 MPa those rise to 1373.8 N and 1233.1 N, with a theoretical maximum of 200.1 kgf at 1.0 MPa. The base stroke is 300 mm and the extend stroke can be trimmed by up to 20 mm via the external adjuster. Air supply is 0.15-1.0 MPa (22-145 psi) and speed runs 30-800 mm/s.
Yes. The round barrel is stainless steel and the 16 mm rod is carbon steel hard-chrome plated to 20 um, so the cylinder tolerates washdown and humid air far better than painted minis. Aluminium-alloy covers are riveted and rolled onto the tube for a sealed joint.
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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