The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X700-50STC 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. Ø80mm bore, 700mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X700-50STC is an 80 mm bore double-acting single-rod cylinder with a 50 mm rear-cap adjusting screw, letting you fine-tune the stroke end position on the machine without swapping the cylinder. It delivers 2513 N of push force at 0.5 MPa and 4523 N at 0.9 MPa, driven by a 25 mm diameter rod with PT3/8 ports.
This model is configured with a built-in magnet (-S) for CMSG/DMSG/EMSG sensors and a centre trunnion (TC) mount, supplied with the TCM1 bracket for pivoting applications. The 700 mm nominal stroke is well within the 1500 mm maximum for this bore, and the 28 mm air cushion decelerates the piston smoothly near stroke end.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X700-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 700 mm |
| Stroke adjustment | Up to 50 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. |
| ×700 | 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.
The 50 mm adjust range lets technicians dial in the exact end-stop position during initial machine setup, accommodating stack-up tolerances without needing to machine custom spacers.
Ideal for packaging lines where the push distance changes with product size. Operators can quickly adjust the stroke end via the rear screw, minimizing downtime between batches.
In long-running clamping or pressing fixtures, the adjustable stroke can be extended slightly to compensate for tooling or pad wear, maintaining consistent contact pressure over time.
Choose the SCJ80X700-50STC when you need a 700 mm reach with the ability to dial back the stroke end by up to 50 mm during commissioning or changeovers. If you require more force, stepping up to the 100 mm bore provides 3927 N of push at 0.5 MPa; for a more compact solution, the 63 mm bore offers 1559 N. This is a direct replacement for an AirTAC SCJ80X700-50 cylinder with an S magnet and TC trunnion mount, matching the PT port thread.
For a 700 mm stroke, consider side-loading and rod bending. Use an external linear guide or consider a guided cylinder if the load is not perfectly axial, as the tie-rod construction is not designed to support high transverse forces.
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 is 5026 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
Yes, this is a direct form-and-function replacement for any AirTAC SCJ80 cylinder with a 700 mm nominal stroke, 50 mm adjust range, built-in magnet, and TC centre trunnion mount with PT ports. Verify your existing mounting bracket is the TCM1 style to match the included hardware.
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