Airtac SCJ50 Standard Cylinder SCJ50X75-50TC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X75-50TC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 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-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X75-50TC
The SCJ50X75-50TC is a 50 mm bore double-acting, single-rod pneumatic cylinder from AirTAC, featuring a rear adjusting screw that provides up to 50 mm of field-adjustable stroke-end retraction. This allows fine-tuning of the piston stop position without removing the cylinder, making it ideal for applications requiring precise end-point calibration during commissioning or format changes. The cylinder delivers a push force of 982 N at 0.5 MPa and uses a 20 mm diameter piston rod with an M16x1.5 male thread.
This model is configured with a centre trunnion (TC) mount, supplied with the TCM1 bracket (order code F-SC50TC), which allows the cylinder body to pivot and absorb angular misalignment in swinging load applications. The standard PT1/4 ports and TPU seals suit general industrial use with filtered air from -20 to +70 °C. The body length A is 194 mm, and the adjustable cushion decelerates the piston smoothly at the end of its 75 mm nominal stroke.
Airtac SCJ50 Standard Cylinder SCJ50X75-50TC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X75-50TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 75 mm |
| Stroke adjustment | Up to 50 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 SCJ50X75-50TC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×75 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ50X75-50TC Is Used
End-Stop Calibration
The 50 mm adjustment screw allows operators to dial in the exact retract end position during machine setup, compensating for tooling wear or part tolerance variations without replacing the cylinder.
Product Format Changeover
On packaging or sorting lines, the stroke can be quickly shortened to handle different product sizes. The TC trunnion mount allows the cylinder to pivot freely as it actuates a diverter gate or flipper arm.
Clamping with Variable Thickness
For clamping fixtures that handle parts of varying thickness, the adjustable stroke prevents over-travel and potential part damage, while the 982 N push force at 0.5 MPa provides a secure hold.
Is the Airtac SCJ50 Standard Cylinder SCJ50X75-50TC the Right Cylinder?
Choose the SCJ50X75-50TC when you need a mid-range 50 mm bore cylinder with a pivoting trunnion mount and the ability to shorten the stroke end by up to 50 mm on the machine. If your force requirement is lower, stepping down to a 40 mm bore reduces push force to 628 N at 0.5 MPa; for higher force, the 63 mm bore provides 1559 N. This adjustable-stroke model is the correct replacement for an existing AirTAC SCJ50X75-50TC with a TC mount and PT threads. If your application requires a fixed, non-adjustable stroke, the standard SC series with a TC mount is a more cost-effective alternative.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ50X75-50TC FAQ
At the standard operating pressure of 0.5 MPa, this 50 mm bore cylinder generates a push force of 982 N and a pull force of 825 N. The maximum push force at the 0.9 MPa operating limit is 1767 N.
Yes, the SCJ50X75-50TC can replace a fixed-stroke SC50X75-TC if you need the ability to fine-tune the stroke end. Ensure the mounting style (TC), port thread (PT), and bore match. The body length is slightly longer to accommodate the adjusting screw mechanism.
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