The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X250-100STC 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, 250mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X250-100STC delivers 1559 N of push force at 0.5 MPa, letting you fine-tune the stroke end position by up to 100 mm without swapping the cylinder. Its 20 mm rod and 28 mm air cushion handle deceleration smoothly, making it a practical choice for mid-range automation tasks where the final stop point needs field adjustment.
This double-acting, single-rod tie-rod cylinder includes a built-in magnet for CMSG/DMSG sensors and a centre trunnion (TC) mount with the TCM1 bracket (order as F-SC63TC). The PT1/4 ports and M16x1.5 rod thread keep it compatible with standard AirTAC fittings, while the 197 mm body length fits neatly into pivoting assemblies.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X250-100STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 250 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. |
| ×250 | 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.
Dial in the exact 250 mm stroke end-stop during machine commissioning using the 100 mm rear adjusting screw, eliminating the need to stock multiple fixed-stroke cylinders for trial runs.
Quickly adjust the push stroke for different product sizes on a packaging line. The magnet-equipped SCJ63X250-100STC confirms position via sensors after each format change.
Take up mechanical wear in clamping or pressing fixtures by advancing the stroke end. The 1559 N push force at 0.5 MPa provides consistent clamping pressure as tooling beds in.
Step up to the 80 mm bore if you need more than 2513 N push at 0.5 MPa; step down to 50 mm (982 N) for lighter, faster moves. The 100 mm adjust range on this SCJ model is ideal for commissioning trials or format changes where the exact stroke length is determined on the machine. For a fixed-stroke version without the rear screw, choose the standard SC63X250.
This 250 mm stroke is well within the 1500 mm maximum for the 63 bore, but always check for side loads on longer strokes. The centre trunnion mount allows the cylinder to pivot, but if the rod sees significant radial force, add an external guide rail or switch to a guided cylinder to prevent bending and seal wear.
Adjustable-stroke checklist
At 0.5 MPa, it produces 1559 N push and 1402 N pull. The push force is higher because it is a single-rod cylinder. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 3118 N.
Yes, if your current cylinder is an AirTAC SCJ63 with a 250 mm nominal stroke and 100 mm adjust range. This STC variant adds a built-in magnet and a centre trunnion mount. Ensure your port thread is PT and the mounting bracket matches the F-SC63TC assembly.
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