Airtac SCJ50 Standard Cylinder SCJ50X75-75TC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X75-75TC 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 SCJ50X75-75TC
The SCJ50X75-75TC is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, providing 982 N of push force at 0.5 MPa. Its rear-cap adjusting screw offers a full 75 mm of stroke-end reduction, allowing operators to fine-tune the 75 mm nominal stroke for commissioning, format changes, or wear compensation without removing the cylinder. The 20 mm piston rod and PT1/4 ports handle standard industrial air supplies.
This model is configured with a centre trunnion (TC) mount, supplied with the TCM1 bracket, making it ideal for applications where the cylinder body needs to pivot. The trunnion mount absorbs misalignment and is suited for swinging or articulating loads. The cylinder body length A(SCJ) is 194 mm, and it features an adjustable air cushion for smooth deceleration. The standard TPU seal operates reliably from -20 to +70 °C.
Airtac SCJ50 Standard Cylinder SCJ50X75-75TC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X75-75TC |
|---|---|
| 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 SCJ50X75-75TC
| 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 SCJ50X75-75TC Is Used
Commissioning & Setup
Fine-tune the end-of-stroke position during machine commissioning without swapping cylinders or machining custom stops. The 75 mm adjustment range provides ample flexibility for initial setup and alignment.
Product Format Changeover
Quickly adapt a diverter or stop gate on a conveyor line for different box or pallet sizes. The rear screw allows a single operator to change the stroke end in minutes, minimizing downtime between production runs.
Wear Compensation
In clamping or pressing operations, use the adjustable stroke to take up slack as tooling or workpieces wear over time. This maintains consistent contact force without reprogramming a servo axis.
Is the Airtac SCJ50 Standard Cylinder SCJ50X75-75TC the Right Cylinder?
Choose the SCJ50 bore when your application requires a push force around 982 N at 0.5 MPa. If you need more force, step up to the SCJ63 bore, which delivers 1559 N of push force at the same pressure. For applications that do not require field adjustment of the stroke end, the fixed-stroke SC50 cylinder is a simpler and more cost-effective alternative. This SCJ50X75-75TC is a direct replacement for another AirTAC SCJ adjustable-stroke cylinder of the same 50 mm bore, 75 mm nominal stroke, 75 mm adjustment range, PT port thread, and TC centre trunnion mounting (F-SC50TC).
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 SCJ50X75-75TC FAQ
The theoretical push force is 982 N at 0.5 MPa and 1767 N at 0.9 MPa. The pull force is lower due to the single piston rod, delivering 825 N at 0.5 MPa. The maximum force at 1.0 MPa is 200 kgf.
It can replace an SC50 if you need the stroke-end adjustment feature, but you must account for the slightly longer body length A(SCJ) of 194 mm. For a direct, non-adjustable replacement, the standard SC50 series is the correct match.
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