Airtac SCJ50 Standard Cylinder SCJ50X100-20S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X100-20S 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, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke100 mm
- Stroke adjust-20 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X100-20S
The SCJ50X100-20S delivers a push force of 982 N at 0.5 MPa, stepping up to 1767 N at the maximum operating pressure of 0.9 MPa. Its rear adjusting screw provides a 20 mm range to fine-tune the stroke end position, making it ideal for commissioning and format changeovers without swapping the cylinder.
This 50 mm bore tie-rod cylinder uses a 20 mm diameter piston rod and PT1/4 ports. The adjustable air cushion, with a 21 mm cushion length, ensures smooth deceleration. The built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
Airtac SCJ50 Standard Cylinder SCJ50X100-20S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X100-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 100 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 SCJ50X100-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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 SCJ50X100-20S Is Used
Commissioning & Setup
The 20 mm adjustment range allows technicians to quickly fine-tune the actuator's end stop during initial machine setup, eliminating the need for shims or external hard stops.
Product Changeover
On packaging lines, the adjustable stroke lets operators rapidly reset the pusher stroke length for different box or product sizes, minimizing downtime between batches.
Wear Compensation
In clamping or pressing fixtures, the screw can be advanced over time to take up mechanical wear in tooling, maintaining consistent clamping force without replacing the cylinder.
Is the Airtac SCJ50 Standard Cylinder SCJ50X100-20S the Right Cylinder?
Choose the SCJ50X100-20S when you need to dial in a precise stroke end on the machine. If your force requirement is lower, the 40 mm bore SCJ40 series provides 628 N of push at 0.5 MPa; for more power, the 63 mm bore SCJ63 steps up to 1559 N. For applications requiring a fixed, non-adjustable stroke, the standard SC series is a more economical choice. This model is a direct replacement for any AirTAC SCJ50X100-20S cylinder with PT ports and a magnet.
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 SCJ50X100-20S FAQ
At the standard 0.5 MPa operating pressure, this double-acting cylinder produces 982 N of push force and 825 N of pull force. At the maximum 0.9 MPa, the push force increases to 1767 N.
Yes, if you need field adjustability. The SCJ50X100-20S shares the same mounting footprint and port size as the SC50X100. Ensure your application can accommodate the slightly longer rear cap that houses the adjusting screw.
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Related AirTAC SCJ Adjustable-Stroke Cylinders
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