The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X150-40STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø63mm bore, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCJ63X150-40STC is a double-acting, single-rod tie-rod cylinder with a rear adjusting screw that provides a 40 mm field-adjustable stroke range. With a 63 mm bore, it delivers 1559 N of push force at 0.5 MPa, making it a robust workhorse for applications where the end position must be dialled in precisely during commissioning or changeover.
This model is factory-configured with a built-in magnet (S) for direct mounting of CMSG/DMSG sensors and a centre trunnion (TC) pivot mount, which ships with the TCM1 bracket for smooth swinging motion. The 20 mm rod and 28 mm air cushion at each end ensure reliable deceleration across its 150 mm nominal stroke.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X150-40STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 40 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. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -40 | 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 40 mm adjustment screw lets technicians fine-tune the end-stop position on a new packaging machine without fabricating custom hard stops, cutting commissioning time significantly.
Quickly adjust the stroke end to accommodate different box sizes on a case packer or palletiser. The centre trunnion mount allows the cylinder to pivot freely as the stroke length is modified.
On clamping or pressing fixtures, the adjustable stroke can be extended slightly over time to compensate for pad wear, maintaining consistent clamping force without replacing the tooling.
Choose the SCJ63 when your load requires the 1559 N push force this 63 mm bore provides at 0.5 MPa. If your force needs are lower, stepping down to a 50 mm bore (982 N push) can reduce air consumption and physical size. For higher demands, the 80 mm bore delivers 2513 N push. The SCJ is the right pick when you need to fine-tune the stroke end without swapping cylinders; if your stroke is fixed and never needs field adjustment, a standard SC63X150 will be a simpler, more cost-effective alternative.
This SCJ63X150-40STC is a direct replacement for another AirTAC SCJ cylinder of the same 63 mm bore, 150 mm nominal stroke, 40 mm adjust range, PT port thread, TC centre trunnion mount, and built-in magnet. For strokes of 300 mm or longer, always consider an external guide rail or a guided cylinder to protect the 20 mm rod from side-load bending.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, it generates 1559 N of push force and 1402 N of pull force. The push force is higher because the single rod reduces the piston area on the return side. The maximum theoretical push force at 1.0 MPa is 318 kgf (3118 N).
Yes, if you need the 40 mm field-adjustability. The SCJ63 body is slightly longer than a fixed-stroke SC63 to house the adjustment screw. Ensure your mounting arrangement has clearance for the longer body length (A=197 mm) and that you match the PT port thread, TC mount, and magnet sensor options.
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