Airtac SCJ63 Standard Cylinder SCJ63X100-20H
The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X100-20H 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. Ø63mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Nominal stroke100 mm
- Stroke adjust-20 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 28 mm
About the Airtac SCJ63 Standard Cylinder SCJ63X100-20H
The SCJ63X100-20H is a double-acting, single-rod pneumatic cylinder engineered for applications where the stroke end position needs fine-tuning on the machine. Its rear-cap adjusting screw provides up to 20 mm of retraction from the nominal 100 mm stroke, allowing operators to dial in the exact stopping point without swapping the cylinder or adding external hard stops.
This model is built with high-temperature Viton (FKM) seals, extending the operating range to 0–150°C and making it suitable for hot or chemically aggressive environments. The 63 mm bore delivers a push force of 1559 N at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa. It features a 20 mm diameter piston rod, PT1/4 ports, and a 28 mm air cushion for smooth deceleration.
Airtac SCJ63 Standard Cylinder SCJ63X100-20H Technical Specifications
| Model | Airtac SCJ63 Standard Cylinder SCJ63X100-20H |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 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, 28 mm |
| Max stroke | Up to 1500 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SCJ63 Standard Cylinder SCJ63X100-20H
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 63 | 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 SCJ63 Standard Cylinder SCJ63X100-20H Is Used
Hot Press End-Stop Calibration
In thermal forming or laminating presses operating up to 150°C, the Viton seals and adjustable stroke allow precise setting of the platen stop position to control material thickness without cooling the actuator.
Diverter Gate Positioning
Fine-tune the retracted position of a diverter gate on a high-temperature conveyor line. The 20 mm adjustment compensates for gate edge wear, maintaining reliable product sorting without replacing the cylinder.
Hot-Fill Nozzle Depth Setting
Adjust the insertion depth of a filling nozzle into hot liquid containers. The SCJ63X100-20H allows quick stroke-end changes during format changeovers, ensuring consistent fill levels across different bottle heights.
Is the Airtac SCJ63 Standard Cylinder SCJ63X100-20H the Right Cylinder?
Choose the SCJ63X100-20H when you need to commission a stop position precisely or accommodate minor wear without mechanical rework. If the 1559 N push force at 0.5 MPa is slightly too high, stepping down to a 50 mm bore reduces push force to 982 N; if it is insufficient, the 80 mm bore provides 2513 N. For applications where the stroke is permanently fixed, the standard SC series offers a more economical choice without the adjusting mechanism.
A direct replacement must match the 63 mm bore, 100 mm nominal stroke, 20 mm adjustment range, PT port thread, and Viton seal material. This cylinder uses the basic mounting style; if a pivoting mount is required, the TC centre trunnion kit is available. For strokes of 300 mm or longer, evaluate side loads on the 20 mm rod and consider an external guide unit 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 SCJ63 Standard Cylinder SCJ63X100-20H FAQ
Being a single-rod cylinder, the push and pull forces differ. At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N.
A rear-cap screw mechanically limits the piston's retraction stroke end by up to 20 mm. It is a direct dimensional replacement for another AirTAC SCJ63 cylinder with the same nominal stroke and adjustment range. It cannot directly replace an SC fixed-stroke cylinder without verifying that the longer SCJ body length fits the machine.
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