Airtac SCJ50 Standard Cylinder SCJ50X75-75
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X75-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø50mm bore, 75mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke75 mm
- Stroke adjust-75 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X75-75
The SCJ50X75-75 is a double-acting, single-rod pneumatic cylinder that puts fine stroke control directly on the machine. With a 50 mm bore delivering 982 N of push force at 0.5 MPa, it handles medium clamping, pressing, and positioning tasks. Its rear-cap adjusting screw provides a full 75 mm of field-adjustable stroke reduction, letting you dial in the exact end position without swapping the cylinder or adding hard stops.
Built on a rugged tie-rod platform, this cylinder uses a 20 mm diameter piston rod and PT1/4 ports. The adjustable air cushion, with a 21 mm cushion length, decelerates the piston smoothly at stroke end. At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N, giving you a substantial power reserve in the same compact envelope.
Airtac SCJ50 Standard Cylinder SCJ50X75-75 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X75-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 75 mm |
| Stroke adjustment | Up to 75 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCJ50 Standard Cylinder SCJ50X75-75
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×75 | Nominal (maximum) stroke length in mm. |
| -75 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCJ50 Standard Cylinder SCJ50X75-75 Is Used
Format Changeovers
Adjust the stroke end in seconds when switching between product sizes on packaging or labeling machines, eliminating the need for mechanical stop changes.
Commissioning & Setup
Fine-tune the actuator end position during initial machine build-out to compensate for assembly tolerances without re-machining brackets.
Wear Compensation
Take up mechanical play or tooling wear over time by slightly extending the effective stroke, maintaining consistent process quality.
Is the Airtac SCJ50 Standard Cylinder SCJ50X75-75 the Right Cylinder?
Choose the SCJ50X75-75 when you need to fine-tune the stroke end position during commissioning or changeovers within a 75 mm window. If your force requirement is lower, the 40 mm bore SCJ40 series provides 628 N of push force at 0.5 MPa in a slightly smaller body. For a fixed, non-adjustable stroke, the standard SC50 series is a simpler, cost-effective alternative. This SCJ cylinder is a direct dimensional replacement for another AirTAC SCJ50 with a 75 mm nominal stroke, 75 mm adjust range, PT ports, and basic mounting.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-75)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ50 Standard Cylinder SCJ50X75-75 FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The pull force is lower due to the 20 mm rod reducing the piston area on the return stroke. At the maximum operating pressure of 0.9 MPa, the push force increases to 1767 N.
Yes, if you need the adjustable stroke feature. The SCJ50X75-75 has the same bore, port size (PT1/4), and mounting footprint as a fixed-stroke SC50, but the body is slightly longer to house the rear adjusting screw. Ensure the 75 mm nominal stroke and 75 mm adjust range match your application's travel needs.
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