Airtac SCJ63 Standard Cylinder SCJ63X100-20STC
The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X100-20STC 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 SCJ63X100-20STC
The SCJ63X100-20STC is a double-acting, single-rod pneumatic cylinder featuring a rear-cap adjusting screw that provides a 20 mm field-adjustable stroke-end range. With a 63 mm bore, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it a robust choice for applications requiring fine-tuned end-position control without swapping the cylinder.
This model includes a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors and is equipped with a centre trunnion (TC) pivot mount, supplied with the TCM1 bracket, ideal for swinging loads. The 20 mm rod, PT1/4 ports, and 28 mm air cushion ensure smooth, reliable operation within the standard -20 to +70 °C temperature range.
Airtac SCJ63 Standard Cylinder SCJ63X100-20STC Technical Specifications
| Model | Airtac SCJ63 Standard Cylinder SCJ63X100-20STC |
|---|---|
| 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 SCJ63X100-20STC
| 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 SCJ63X100-20STC Is Used
Format Changeover
Quickly adjust the end stop for different product sizes on a packaging line, eliminating the need for mechanical shims or multiple cylinder changes during batch runs.
Clamp Stroke Fine-Tuning
Dial in the exact clamping depth on a welding or assembly fixture to accommodate slight variations in workpiece thickness without losing clamping force.
Wear Compensation
Compensate for the gradual wear of tooling or gripper pads over time by adjusting the cylinder's end position, maintaining consistent process quality.
Is the Airtac SCJ63 Standard Cylinder SCJ63X100-20STC the Right Cylinder?
Choose the SCJ63X100-20STC when you need to commission a machine stop position precisely within a 20 mm window. If the 1559 N push force at 0.5 MPa is insufficient, stepping up to an 80 mm bore provides 2513 N of push force. For applications where the stroke never needs field adjustment, a fixed-stroke SC63X100 cylinder is a simpler, more cost-effective alternative. This cylinder is a direct replacement for another AirTAC SCJ63X100-20 with a centre trunnion mount, magnet, and PT ports.
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 SCJ63X100-20STC FAQ
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The maximum push force at the 0.9 MPa operating limit is 2805 N. The pull force is lower due to the area of the 20 mm piston rod.
A screw in the rear cap sets the stroke end position. You can shorten the 100 mm nominal stroke by up to 20 mm. This adjusts the piston's stopping point in the extend direction only; it does not change the cylinder's force or speed capability.
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