The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X60-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø63mm bore, 60mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X60-20S is a double-acting, single-rod pneumatic cylinder that puts fine stroke-end adjustment directly on the machine. Its rear-cap screw lets you dial the stroke back by up to 20 mm without removing the cylinder, which is a real time-saver during commissioning or when a fixture wears in. With a 63 mm bore and a 20 mm rod, it delivers 1559 N of push force at 0.5 MPa, giving it the muscle for medium-duty clamping and positioning tasks.
This model includes a built-in magnet, so standard CMSG/DMSG/EMSG reed or solid-state sensors clamp straight onto the tie-rod barrel for reliable end-of-stroke detection. The body length A(SCJ) is 197 mm, and the adjustable air cushion decelerates the piston smoothly at each end. It runs on 40 µm filtered air from 0.15 to 1.0 MPa and handles ambient temperatures from -20 to +70 °C with its standard TPU seals.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X60-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 60 mm |
| Stroke adjustment | Up to 20 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. |
| ×60 | Nominal (maximum) stroke length in mm. |
| -20 | 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.
Use the 20 mm rear adjusting screw to dial in the exact retract position on a pick-and-place unit, compensating for slight variations in workpiece thickness without reprogramming the controller.
As the rubber bumper on a product stop wears down over thousands of cycles, the adjustable stroke lets operators quickly recover the precise stopping position, keeping the line running without swapping parts.
When switching between box sizes on a case packer, the 20 mm adjustment range allows a fast mechanical stroke change, avoiding the need for multiple fixed-stroke cylinders for different formats.
Step up to an 80 mm bore if your application needs more than the 1559 N push force this 63 mm cylinder provides at 0.5 MPa; the SCJ80 delivers 2513 N. If you never need to alter the stroke after initial setup, the fixed-stroke SC63 offers the same force in a slightly shorter body. For a direct replacement, match the 63 mm bore, 60 mm nominal stroke, 20 mm adjust range, PT port thread, basic mounting, and the -S magnet option of this SCJ63X60-20S.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N (the difference is due to the 20 mm single rod). At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N. The adjusting screw does not change the cylinder's force output.
Yes, if you need the field-adjustable stroke feature. The SCJ63 shares the same bore, rod diameter, port size, and mounting accessories as the SC63. Ensure your machine has clearance for the slightly longer body length A(SCJ) of 197 mm and the rear adjusting screw.
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