The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X70-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø63mm bore, 70mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X70-50S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the stopping position by up to 50 mm without swapping the unit. With a 63 mm bore and a 20 mm rod, it delivers 1559 N of push force at 0.5 MPa, making it a solid mid-range actuator for tasks that need precise end-point trimming.
This model includes a built-in magnet (-S suffix), so standard CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the tie-rod barrel for reliable position feedback. The body length A(SCJ) is 197 mm, and the adjustable air cushion helps decelerate the piston smoothly at the end of travel.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X70-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 70 mm |
| Stroke adjustment | Up to 50 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. |
| ×70 | Nominal (maximum) stroke length in mm. |
| -50 | 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, technicians can adjust the 50 mm stroke-end range to fine-tune the actuator's stop point without dismounting the cylinder, speeding up the debug process.
On packaging or assembly lines that switch between product sizes, the rear adjusting screw allows operators to quickly reset the stroke end for different formats, minimizing downtime.
In clamping or pressing fixtures, the adjustable stroke can be used to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent clamping force and position.
Choose the SCJ63X70-50S when you need to dial in the stroke end on the machine—ideal for commissioning trials, format changeovers, or taking up mechanical wear. If your force requirement is lower, the 50 mm bore SCJ series provides 982 N push at 0.5 MPa; for heavier loads, step up to the 80 mm bore at 2513 N. For a direct replacement, match the 63 mm bore, 70 mm nominal stroke, 50 mm adjust range, PT port thread, basic mounting, and the -S magnet option.
Since the nominal stroke is under 300 mm, rod bending from side loads is less of a concern, but always align the load axially. If your application demands a fixed, non-adjustable stroke, the standard SC63X70 cylinder is the direct equivalent without the rear adjusting screw.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. The maximum push force at 0.9 MPa is 2805 N.
A rear-cap adjusting screw lets you shorten the stroke end by up to 50 mm. It sets the physical stop position for the piston, allowing field adjustment without changing the cylinder's 70 mm nominal stroke rating.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.