The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X300-100STC 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, 300mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X300-100STC puts a 100 mm field-adjustable stroke end into a 63 mm bore tie-rod body, letting you dial in the exact stop position during commissioning or changeover without swapping the cylinder. Its 20 mm piston rod delivers 1559 N of push force at 0.5 MPa (2805 N at 0.9 MPa), while the pull side subtracts the rod area for 1402 N at the same 0.5 MPa supply.
This model ships with a built-in magnet (-S) so CMSG/DMSG/EMSG sensors clamp directly onto the barrel for position feedback, and a centre trunnion mount (TC) with the TCM1 bracket included for pivoting applications. The 28 mm air cushion decelerates the piston near stroke end, and the rear adjusting screw shortens the stroke end by up to 100 mm from the nominal 300 mm maximum. Ports are PT1/4 with an M16x1.5 rod thread, and the body length A(SCJ) is 197 mm.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X300-100STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 300 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. |
| ×300 | 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.
The 100 mm adjustment range lets operators quickly reset the end position for different product sizes on packaging or filling lines, eliminating the need for mechanical hard stops.
In clamping or pressing fixtures, the rear screw can be advanced over time to compensate for tooling wear or material compression, maintaining consistent clamp force without reprogramming.
During machine commissioning, the stroke end can be dialled from 200 mm up to the full 300 mm to find the optimal actuator travel, then locked in place for production.
Choose the SCJ63X300-100STC when you need a mid-range force of 1559 N push at 0.5 MPa and a stroke that can be fine-tuned on the machine by up to 100 mm. If your force requirement is lower, the 50 mm bore SCJ delivers 982 N push at 0.5 MPa; for higher force, step up to the 80 mm bore SCJ which provides 2513 N push at the same pressure. Because the nominal stroke is 300 mm, be mindful of side-loading on the extended rod—consider an external guide rail or a guided cylinder if the load is not purely axial.
This adjustable-stroke cylinder directly replaces another AirTAC SCJ of the same 63 mm bore, 300 mm nominal stroke, and 100 mm adjust range, provided the port thread is PT, the mounting is TC centre trunnion, and the magnet option (-S) is present. If you do not need field adjustability, the fixed-stroke SC63X300 offers the same force and envelope in a simpler package.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder delivers 1559 N of push force and 1402 N of pull force (the pull force is lower because the 20 mm rod reduces the effective piston area on the return stroke). At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N.
A rear-cap adjusting screw shortens the stroke end by up to 100 mm from the nominal 300 mm maximum, giving you a field-adjustable range of 200–300 mm. It is a direct replacement for any AirTAC SCJ with a 63 mm bore, 300 mm nominal stroke, 100 mm adjust range, PT ports, TC centre trunnion mount, and a built-in magnet.
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