The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X400-100H is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø63mm bore, 400mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X400-100H is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. Its rear-cap adjusting screw provides a full 100 mm of adjustment range, letting you dial in the exact stop position for a 400 mm nominal stroke without swapping the cylinder or adding external hard stops. The 63 mm bore delivers 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa.
This model is built with Viton (FKM) seals, extending the operating temperature range to 0–150 °C and making it suitable for hot or chemically aggressive environments where standard TPU seals would degrade. The 20 mm piston rod and 28 mm air cushion work together to handle high-cycle duties, while the PT1/4 port and M16×1.5 rod thread keep integration straightforward. The body length A(SCJ) is 197 mm, providing a compact footprint for its force class.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X400-100H |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 400 mm |
| Stroke adjustment | Up to 100 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.
| 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.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×400 | Nominal (maximum) stroke length in mm. |
| -100 | 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.
A single SCJ63X400-100H lets a welding or pressing fixture adapt to different part heights on the fly. Operators adjust the rear screw to set the stroke end for each product variant, eliminating the need for multiple fixed-stroke cylinders or mechanical shims.
With its Viton seals rated for 0–150 °C, this cylinder excels as an adjustable end-stop on conveyors near ovens or dryers. The 100 mm adjustment range compensates for thermal expansion of tooling without losing the 1559 N holding force at 0.5 MPa.
During bearing or bushing insertion, the final press depth is critical. The SCJ63X400-100H allows fine-tuning of the stroke end with the adjusting screw, ensuring consistent insertion depth as tooling wears, backed by the cylinder's 2805 N maximum push force.
Choose the SCJ63X400-100H when you need a 63 mm bore's force envelope with the ability to trim the stroke end by up to 100 mm during commissioning or product changeovers. If your load requires less force, stepping down to the 50 mm bore (982 N push at 0.5 MPa) saves air and space; for heavier work, the 80 mm bore provides 2513 N push at the same pressure. The adjustable stroke is a stroke-end setter only—it does not change output force or speed. For a fixed, non-adjustable stroke, the standard SC63X400 is the direct alternative. When replacing this unit, match the 63 mm bore, 400 mm nominal stroke, 100 mm adjustment range, PT port thread, and Viton seal material. At this 400 mm stroke, rod deflection under side load becomes a real concern; if the load is not guided externally, add a guide rod assembly or switch to a guided cylinder to protect the rod and bearing.
Adjustable-stroke checklist
Because it is a single-rod cylinder, push and pull forces differ. At 0.5 MPa, it generates 1559 N pushing and 1402 N pulling. At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N. The 100 mm adjustment screw only sets the stroke end position and does not alter these force values.
Yes, this is a direct form-and-function replacement for any AirTAC SCJ63 adjustable-stroke cylinder with a 400 mm nominal stroke and 100 mm adjustment range. Ensure your existing unit uses PT ports and Viton seals. The mounting pattern, rod thread (M16×1.5), and body dimensions are identical to the original SCJ63 design.
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