Airtac SCJ50 Standard Cylinder SCJ50X60-20TC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X60-20TC 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, 60mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke60 mm
- Stroke adjust-20 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X60-20TC
The SCJ50X60-20TC is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides a 20 mm field-adjustable stroke range. At 0.5 MPa, it delivers 982 N of push force and 825 N of pull force, making it a capable mid-bore actuator for tasks that need fine end-position tuning without swapping the cylinder.
This model features a centre trunnion (TC) mount, supplied with the TCM1 bracket (F-SC50TC), allowing the cylinder to pivot during operation. The 50 mm bore houses a 20 mm diameter piston rod with an M16x1.5 thread, and the PT1/4 ports supply air to the 21 mm long adjustable air cushion for smooth deceleration.
Airtac SCJ50 Standard Cylinder SCJ50X60-20TC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X60-20TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 60 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 SCJ50X60-20TC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×60 | 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 SCJ50X60-20TC Is Used
Commissioning & Setup
Field technicians can fine-tune the stroke end position by up to 20 mm during initial machine setup, eliminating the need to stock multiple fixed-stroke cylinders for trial-and-error positioning.
Format Changeovers
On packaging or sorting lines, the adjustable stroke allows operators to quickly adapt the cylinder's end-stop for different product sizes without mechanical modifications, reducing downtime between batches.
Wear Compensation
In clamping or pressing fixtures, the adjusting screw can be used to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent clamping force without replacing the actuator.
Is the Airtac SCJ50 Standard Cylinder SCJ50X60-20TC the Right Cylinder?
Choose the SCJ50 when you need the adjustable stroke convenience in the 50 mm bore class. If your force requirement is lower, the SCJ40 provides 628 N of push force at 0.5 MPa, while a step up to the SCJ63 offers 1559 N. For applications where the stroke is fixed and never needs field adjustment, the standard SC50 fixed-stroke cylinder is a more economical choice.
This SCJ50X60-20TC directly replaces any AirTAC SCJ adjustable cylinder of the same bore, 60 mm nominal stroke, 20 mm adjustment range, PT port thread, and TC centre trunnion mounting. Ensure the replacement matches the magnet option if sensors are used. For strokes over 300 mm in this bore, evaluate side-loading on the 20 mm rod and consider an external guide rail to prevent bending.
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 SCJ50X60-20TC FAQ
At the standard operating pressure of 0.5 MPa, this cylinder provides 982 N of push force and 825 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1767 N. The pull force is lower due to the area of the 20 mm piston rod.
You can if the mounting style and port thread match, but the SCJ body is slightly longer than a fixed-stroke SC to house the adjusting mechanism. Ensure you have the extra clearance. The TC mount on this model is for pivoting applications; a basic or foot-mounted SC would need a different mounting bracket.
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