Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-40S 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 MACJ50X300-40S
Dial in your stop point anywhere within 40 mm using the external adjuster on the MACJ50X300-40S, an AirTAC MA-series round mini cylinder in the 50 mm bore class. Cushioning is variable at both ends, so faster cycles or heavier shifts do not hammer the covers. Thrust at 0.5 MPa reaches 981.3 N extend and 880.8 N retract.
The magnet comes built in as standard, so CMSG, DMSG or EMSG switches mount straight on for end-of-stroke signals. For planning, the rod equals roughly 100 kg of vertical lift at 0.5 MPa; halve that to about 50 kg for a safe 2:1 margin on real lifts.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-40S |
|---|---|
| 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 MACJ50X300-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×300 | Stroke length in mm. |
| -40 | 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 MACJ50X300-40S Is Used
Case diverter on sortation lines
Push cartons from a main belt into a lane; 40 mm of trim absorbs belt width changes and the variable cushion keeps 300 mm strokes quiet at up to 800 mm/s.
Press-in pin setter
Seat dowel pins into furniture panels; the external stop gives repeatable depth and about 589 N of usable thrust at 0.5 MPa avoids crushing the veneer.
Carriage position indexer
Index a light carriage along a washdown conveyor in a dairy, with CMSG switches reading the standard magnet and the stainless barrel resisting caustic foam.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-40S the Right Cylinder?
Size from the force table: 628.3 N at bore 40, 981.3 N here, 1557.9 N at bore 63, all at 0.5 MPa. If the 40 mm trim range is more than needed, the -20 or -30 variants cut cost; the -50 version adds another 10 mm of fine-tuning. Ports are 1/4" on every bore 50 model with an M14x1.5 male rod thread, and the standard magnet accepts CMSG, DMSG and EMSG switches.
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 MACJ50X300-40S FAQ
Expect 981.3 N push and 880.8 N pull at 0.5 MPa, climbing to 1373.8 N and 1233.1 N at 0.7 MPa with a 200.1 kgf theoretical ceiling at 1.0 MPa. The 300 mm stroke shortens by up to 40 mm through the stop screw, cushioning is variable at both ends, and the rod thread is M14x1.5.
No special order is required. Every MA-series cylinder, this one included, carries a built-in magnet as standard, so CMSG, DMSG and EMSG snap-on switches detect position without modifying the piston.
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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