Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-75S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-75S 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 MACJ50X300-75S
The -75 code gives this 50 mm cylinder one of the widest on-site trim ranges available: the extend stroke can be set anywhere from 225 to 300 mm with the external stop screw. At 0.5 MPa the bore pushes 981.3 N and retracts with 880.8 N, and the variable cushions at both ends let you chase the 800 mm/s top speed without metal-to-metal impacts. It runs on 0.15-1.0 MPa (22-145 psi) filtered air.
Under the skin sits a stainless-steel round barrel rolled onto aluminium covers, with a hard-chrome plated rod and a grease-holding two-way seal - a package that shrugs off condensation and light washdown. The magnet is included as standard, so CMSG, DMSG and EMSG switches drop straight on. Budget about 589 N for real work at 0.5 MPa; that is roughly a 50 kg vertical lift kept at a 2:1 margin, plenty for trays and small assemblies.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-75S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-75S |
|---|---|
| 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 MACJ50X300-75S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×300 | Stroke length in mm. |
| -75 | 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 MACJ50X300-75S Is Used
Tray denester above a filling line
Pushes the lowest tray off a stack into the infeed chain, with the 75 mm trim covering tray heights from 225 to 300 mm without swapping cylinders.
Gate actuator on a paint-line conveyor
Diverts racks between booths using 981.3 N of push at 0.5 MPa; the stainless body copes with humid booth air that corrodes painted units.
Robotic cell part ejector
Ejects machined housings from a fixture over 300 mm; an EMSG switch confirms full retract before the robot re-enters the workspace.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X300-75S the Right Cylinder?
Compared against neighbours, the 40 mm bore offers 628.3 N at 0.5 MPa and the 63 mm bore offers 1557.9 N, placing this model in the middle for long-reach pushers and clamps. At 300 mm of travel, side loads become the main rod enemy - support the load on external guides and align the thrust axis carefully. FA flange and LB foot mounts, plus I or Y knuckles, handle the fixturing. The adjuster is a positional stop, not a holding brake; on air loss the rod still drifts.
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 MACJ50X300-75S FAQ
Yes: 981.3 N push and 880.8 N pull at 0.5 MPa; 1373.8 N push and 1233.1 N pull at 0.7 MPa; 200.1 kgf theoretical maximum at 1.0 MPa. It is double-acting with an adjustable stroke, runs on 0.15-1.0 MPa (22-145 psi) air and reaches 30-800 mm/s.
The -75 suffix allows the extend stroke to be shortened anywhere across a 75 mm span, from 225 up to 300 mm. The retract stroke stays at 300 mm and both ends keep their variable cushioning. The stop is purely mechanical and does not lock the load if air pressure is lost.
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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