Airtac SCJ50 Standard Cylinder SCJ50X90-75
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X90-75 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, 90mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke90 mm
- Stroke adjust-75 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X90-75
The SCJ50X90-75 is a double-acting, single-rod pneumatic cylinder with a 50 mm bore and a nominal 90 mm stroke, featuring a rear-cap adjusting screw that provides a 75 mm field-adjustable range. This allows the effective stroke end to be precisely shortened anywhere from 15 mm up to the full 90 mm, delivering 982 N of push force and 825 N of pull force at 0.5 MPa operating pressure.
The 20 mm diameter piston rod and M16x1.5 rod thread ensure robust mechanical connection, while the 21 mm adjustable air cushion at each end decelerates the piston for smooth, quiet operation. With a PT1/4 port, this tie-rod cylinder is a versatile solution for applications requiring on-machine stroke fine-tuning without cylinder replacement.
Airtac SCJ50 Standard Cylinder SCJ50X90-75 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X90-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 90 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 SCJ50X90-75
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×90 | 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 SCJ50X90-75 Is Used
Commissioning Fine-Tuning
During machine setup, the 75 mm adjustment screw allows engineers to precisely dial in the stroke end position for actuators on packaging or assembly lines, eliminating the need for external hard stops.
Format Changeover
On multi-product production lines, operators can quickly adjust the stroke of a pusher or diverter by up to 75 mm to accommodate different product sizes without swapping the cylinder, reducing downtime.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke can be periodically shortened to take up mechanical wear in tooling or seals, maintaining consistent clamping force and position over the cylinder's service life.
Is the Airtac SCJ50 Standard Cylinder SCJ50X90-75 the Right Cylinder?
Choose the SCJ50X90-75 when you need to dial in a precise stroke end position during commissioning or changeover, with the 75 mm adjustment range offering exceptional flexibility. If your application requires more force, stepping up to the 63 mm bore provides 1559 N of push force at the same 0.5 MPa pressure. For a fixed, non-adjustable stroke, the standard SC50X90 is a direct alternative.
For drop-in replacement, match an AirTAC SCJ cylinder with a 50 mm bore, a nominal stroke of 90 mm or greater, a -75 adjustable range, and PT ports. This basic mount model uses the cylinder body for direct installation. For pivoting applications, consider the TC centre trunnion mount with the F-SC50TC bracket.
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 SCJ50X90-75 FAQ
At the standard 0.5 MPa operating pressure, the cylinder provides 982 N of push force and 825 N of pull force. The maximum push force at 0.9 MPa is 1767 N. The rear adjusting screw only changes the stroke end position and does not alter the cylinder's force output.
Yes, the SCJ50X90-75 is dimensionally compatible in terms of bore, rod, and porting. The body length A is 194 mm, which is slightly longer than a fixed-stroke SC to house the adjusting mechanism. Ensure the extra rear-cap length and the 75 mm adjustment range fit your machine envelope.
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