The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X70-10S 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. Ø80mm bore, 70mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X70-10S is a double-acting, single-rod pneumatic cylinder with a 10 mm rear-end adjustable stroke, allowing fine-tuning of the piston's end position without changing the cylinder. With an 80 mm bore and a 25 mm rod, it delivers a substantial push force of 2513 N at 0.5 MPa, making it suitable for medium-to-heavy clamping and positioning tasks where the final stroke length needs precise field calibration.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for reliable end-of-stroke detection. The standard PT3/8 port and TPU seals provide a wide operating temperature range of -20 to +70 °C, and the integrated air cushion decelerates the piston smoothly over the final 28 mm of travel.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X70-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 70 mm |
| Stroke adjustment | Up to 10 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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 | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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. |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 rear screw adjustment allows engineers to dial in the exact stop position during machine commissioning, compensating for assembly tolerances without needing shims or custom end stops.
In a clamping station for parts with slight thickness variations, the adjustable stroke end can be set to apply consistent pressure without over-stroking, protecting both the part and the tooling.
In high-cycle pressing applications, the stroke end can be periodically re-adjusted to compensate for wear on contact surfaces, maintaining consistent pressing depth and extending tooling life.
Choose the SCJ80X70-10S when you need a robust 80 mm bore actuator with a 70 mm maximum stroke and the ability to shorten it by up to 10 mm for commissioning or wear take-up. If the push force is insufficient, stepping up to a 100 mm bore provides 3927 N at 0.5 MPa; if it is excessive, the 63 mm bore offers 1559 N. For applications needing a fixed, non-adjustable stroke, consider the standard SC80X70 cylinder.
A direct replacement must match the 80 mm bore, 70 mm nominal stroke, 10 mm adjust range, PT3/8 ports, and the integrated magnet. This basic-mount model requires no additional brackets, but if a pivoting motion is needed, the TC centre trunnion (F-SC80TC) can be specified on a different model code.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N, though the maximum recommended operating force is 4523 N at 0.9 MPa.
The rear-cap adjusting screw limits the piston's forward stroke end, allowing you to shorten the 70 mm nominal stroke by up to 10 mm. It is a mechanical stop for stroke setting, not a locking device. The cylinder will not hold its position if air pressure is lost; an external pilot-operated check valve or rod lock is required for load holding.
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