The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X35-30 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø63mm bore, 35mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X35-30 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides 30 mm of field-adjustable stroke-end control. With a 63 mm bore and a 20 mm rod, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it a solid mid-range actuator for tasks that need precise mechanical end-stop tuning during commissioning or changeover.
The tie-rod construction keeps the body length A at 197 mm, and the adjustable screw shortens the 35 mm nominal stroke by up to 30 mm without altering the cylinder's fundamental force output. The integrated air cushion (28 mm length) decelerates the piston smoothly, and the PT1/4 ports and M16x1.5 rod thread ensure straightforward integration with standard pneumatic fittings.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X35-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 35 mm |
| Stroke adjustment | Up to 30 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. |
| ×35 | Nominal (maximum) stroke length in mm. |
| -30 | 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.
During machine setup, use the 30 mm adjusting screw to dial in the exact push or clamp position without fabricating custom hard stops, saving hours of mechanical rework.
Quickly adjust the stroke end to accommodate different box or carton sizes on a packaging machine, reducing downtime between production runs with a simple screw adjustment.
Compensate for pad wear or material thickness variation in a clamping station by advancing the stroke end with the rear screw, maintaining consistent clamping force without replacing the cylinder.
Step up to a 50 mm bore (982 N push at 0.5 MPa) if your load is lighter and you want a smaller footprint, or move to an 80 mm bore (2513 N push) for heavier applications. This SCJ is the right pick when you need to dial in a precise stroke end on the machine; if your stroke is fixed and never changes, the standard SC63 fixed-stroke cylinder is a simpler, more cost-effective alternative. For direct replacement, match the 63 mm bore, 35 mm nominal stroke, 30 mm adjust range, PT port thread, and basic mounting. If you need position sensing, order the -S magnet version to use CMSG/DMSG sensors.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 63 mm bore cylinder produces 1559 N of push force and 1402 N of pull force. The maximum push force at 0.9 MPa is 2805 N. The adjusting screw does not change these force values; it only sets the mechanical end position of the stroke.
Yes, if you need adjustable stroke. The SCJ shares the same bore, rod diameter, port size, and mounting accessories (FA, LB, TC) as the SC63. Ensure the 35 mm nominal stroke and 30 mm adjust range cover your motion requirements, and match the port thread (PT) and any magnet or seal options.
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