Airtac SCJ50 Standard Cylinder SCJ50X20-10S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X20-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø50mm bore, 20mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke20 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X20-10S
The SCJ50X20-10S is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw, allowing the stroke end position to be fine-tuned by up to 10 mm without removing the unit. With a 50 mm bore, it delivers a substantial 982 N of push force at 0.5 MPa, making it a capable actuator for short-throw, high-precision positioning tasks.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for electronic end-of-stroke confirmation. The 20 mm rod is guided by a 21 mm air cushion, ensuring smooth deceleration even in rapid cycling applications up to 800 mm/s.
Airtac SCJ50 Standard Cylinder SCJ50X20-10S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X20-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 20 mm |
| Stroke adjustment | Up to 10 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 SCJ50X20-10S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×20 | Nominal (maximum) stroke length in mm. |
| -10 | 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 SCJ50X20-10S Is Used
Sensor Calibration Jigs
Fine-tune the physical stop position during sensor teach-in routines. The 10 mm screw adjustment allows technicians to dial in the exact trigger point without loosening mounting hardware.
Small-Part Clamping
Set a precise, repeatable clamping depth for delicate components. The adjustable stroke prevents over-travel and part damage, with the magnet confirming the clamp is fully engaged.
Product Gate Actuation
Operate a small diverter gate on a conveyor line. The 20 mm nominal stroke with 10 mm of adjustment accommodates slight variations in product width or gate wear over time.
Is the Airtac SCJ50 Standard Cylinder SCJ50X20-10S the Right Cylinder?
Choose the SCJ50X20-10S when you need a compact, adjustable end-stop within a 10 mm window. If the force is insufficient, stepping up to a 63 mm bore provides 1559 N of push force at the same pressure. For applications where the stroke is permanently fixed and never needs field adjustment, the standard SC50 series offers a simpler, cost-effective alternative. This model is a direct replacement for any AirTAC SCJ50X20-10S cylinder with a PT port and built-in magnet.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ50X20-10S FAQ
At the standard operating pressure of 0.5 MPa, the cylinder provides 982 N of push force and 825 N of pull force. The maximum push force at 0.9 MPa is 1767 N. The adjusting screw does not alter the force output.
A screw in the rear cap sets the retracted end position of the piston. Turning the screw shortens the effective stroke by up to 10 mm from the nominal 20 mm. It is a mechanical stop for positioning, not a speed or force controller.
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