Airtac SCJ50 Standard Cylinder SCJ50X75-20TC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X75-20TC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 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-20 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X75-20TC
The SCJ50X75-20 is a double-acting, single-rod pneumatic cylinder from AirTAC, featuring a rear-cap adjusting screw that provides 20 mm of field-adjustable stroke-end control. With a 50 mm bore and 75 mm nominal stroke, it delivers 982 N of push force at 0.5 MPa, making it a robust choice for applications requiring precise end-position tuning.
This model is configured with a TC centre trunnion mount, allowing the cylinder to pivot during operation, which is ideal for swinging or articulating loads. The 20 mm rod and PT1/4 ports ensure compatibility with standard pneumatic setups, while the 21 mm air cushion provides smooth deceleration near the stroke end.
Airtac SCJ50 Standard Cylinder SCJ50X75-20TC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X75-20TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 75 mm |
| Stroke adjustment | Up to 20 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 SCJ50X75-20TC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×75 | Nominal (maximum) stroke length in mm. |
| -20 | 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 SCJ50X75-20TC Is Used
Commissioning & Setup
Fine-tune the end-of-stroke position during machine commissioning to account for assembly tolerances without mechanical rework.
Format Changeovers
Quickly adjust the stroke end for different product sizes on packaging or sorting lines, reducing downtime between batches.
Wear Compensation
Compensate for tooling or gripper wear over time by slightly extending the effective stroke, maintaining consistent part engagement.
Is the Airtac SCJ50 Standard Cylinder SCJ50X75-20TC the Right Cylinder?
Select the SCJ50X75-20 when you need to fine-tune the stroke end position on a machine without swapping the cylinder. If 982 N of push force is insufficient, stepping up to the 63 mm bore offers 1559 N; if it is more than needed, the 40 mm bore provides 628 N. For fixed-stroke applications where adjustability is not required, the standard SC series is a direct alternative. When replacing this cylinder, match the 50 mm bore, 75 mm nominal stroke, 20 mm adjust range, PT ports, and TC mount with the F-SC50TC bracket.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-20)
- ✓ 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 SCJ50X75-20TC FAQ
At the standard operating pressure of 0.5 MPa, this cylinder provides 982 N of push force and 825 N of pull force due to the single-rod design. The maximum push force at 0.9 MPa is 1767 N.
Yes, if the mounting and porting match. The SCJ series shares the same basic dimensions and mounting accessories as the SC, but adds a rear adjusting screw. Ensure the 20 mm stroke reduction range is suitable for your application.
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