The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-40S 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, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X500-40S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering a push force of 1559 N at 0.5 MPa. Its rear-cap adjusting screw provides up to 40 mm of stroke-end reduction, allowing precise mechanical tuning of the piston's stop position without changing the cylinder body. The 20 mm diameter piston rod and PT1/4 ports are standard for this 63 mm bore class.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors on the tie-rod barrel for reliable end-of-stroke detection. With a 500 mm nominal stroke and a 28 mm air cushion, it is well-suited for medium-force automation tasks where commissioning adjustments or format changeovers demand a variable stroke end point.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 500 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. |
| ×500 | 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.
During machine commissioning, the 40 mm adjustment screw allows engineers to precisely dial in the stroke end position for a perfect fit with tooling or fixtures, eliminating the need for shims or custom end stops.
On a packaging line, the adjustable stroke lets operators quickly change the pusher's end position for different box sizes by turning a screw, rather than swapping out the entire 500 mm stroke cylinder.
In high-cycle clamping or pressing operations, the stroke end can be adjusted over time to compensate for wear on pads or tooling, maintaining consistent clamping force without reprogramming the machine.
Choose the SCJ63X500-40S when your application requires a nominal 500 mm stroke with the ability to fine-tune the end position by up to 40 mm. If the 1559 N push force at 0.5 MPa is insufficient, stepping up to an 80 mm bore provides 2513 N. For a fixed, non-adjustable stroke, the standard SC63X500 is a direct alternative. This cylinder is a direct replacement for another AirTAC SCJ63X500-40S with a PT port, basic mounting, and magnet.
At a 500 mm stroke, consider the potential for side loading and rod deflection. If the load is not guided externally, an external guide rail or a guided cylinder should be used to prevent bending of the 20 mm rod and ensure long seal life.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The pull force is lower due to the area of the 20 mm piston rod. The maximum push force at 0.9 MPa is 2805 N.
A screw in the rear end cap acts as an adjustable mechanical stop for the piston. By turning the screw, you can shorten the stroke end position by up to 40 mm from the nominal 500 mm maximum. It does not adjust the cylinder's force or speed, only the physical stopping point of the piston rod.
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