The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X85-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø63mm bore, 85mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCJ63X85-10S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering 1559 N of push force at 0.5 MPa. A rear-cap adjusting screw provides up to 10 mm of stroke-end shortening, allowing fine-tuning of the piston stop position without replacing the cylinder or adding external hard stops. The 20 mm rod and 28 mm air cushion ensure smooth deceleration, while the PT1/4 ports supply ample flow for the 63 mm bore.
This model includes a built-in magnet, enabling direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for precise end-of-stroke or mid-stroke position feedback. The standard TPU seals offer reliable operation from -20 to +70 °C, making it a versatile workhorse for commissioning, format changes, and wear take-up in automated machinery.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X85-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 85 mm |
| Stroke adjustment | Up to 10 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. |
| ×85 | Nominal (maximum) stroke length in mm. |
| -10 | 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 10 mm adjustment screw lets technicians dial in the exact stroke end during machine commissioning without swapping cylinders, saving hours of mechanical rework on a new packaging line.
On a conveyor diverter gate, the adjustable stroke can be shortened slightly over time to compensate for pad wear, maintaining a consistent seal without replacing the actuator.
For a multi-product assembly cell, the stroke end can be quickly reset within the 10 mm range to accommodate different product heights, enabling a rapid format change between batches.
Choose the SCJ63 bore when your application needs roughly 1560 N of push force at standard plant air pressure. If you require more force, stepping up to the SCJ80 bore provides 2513 N of push at the same 0.5 MPa. For applications where the stroke is fixed and never needs field adjustment, the standard SC63 fixed-stroke cylinder is a simpler, cost-effective alternative. This SCJ63X85-10S is a direct dimensional replacement only for another AirTAC SCJ63 cylinder with an 85 mm nominal stroke, a 10 mm adjustment range, PT ports, and a magnet. For strokes of 300 mm or more, evaluate side-loading on the 20 mm rod; an external guide rail or a guided cylinder may be necessary to prevent rod bending.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 2805 N. The pull force is always lower due to the area of the 20 mm piston rod.
This model is a direct replacement for an AirTAC SCJ63 with an 85 mm nominal stroke, a 10 mm adjustment range, PT ports, and a magnet. Ensure your mounting style matches; this is a basic cylinder without a bracket. It is not dimensionally interchangeable with ISO 15552 cylinders.
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