The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X350-50 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, 350mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X350-50 is an 80 mm bore double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides 50 mm of field-adjustable stroke-end control. Its push force reaches 2513 N at 0.5 MPa, scaling up to 4523 N at the maximum operating pressure of 0.9 MPa, making it a powerful choice for medium-to-heavy linear applications where the end position needs fine-tuning.
This model features a 25 mm diameter piston rod, PT3/8 ports, and a 28 mm air cushion for smooth deceleration. The adjustable stroke mechanism allows operators to shorten the stroke end by up to 50 mm from the 350 mm nominal maximum, enabling quick setup changes without replacing the cylinder or adding external hard stops. The body length A(SCJ) is 239 mm.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X350-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 350 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. |
| ×350 | 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.
Quickly adjust the end stop for different product sizes on packaging or filling lines by turning the rear screw, eliminating the need for mechanical stop changes.
Fine-tune the final insertion depth of a press-fit operation during commissioning, with the 50 mm range allowing for tooling wear take-up over time.
Set the precise open and closed positions of a material diverter gate on a conveyor system, with the 2513 N push force at 0.5 MPa handling heavy product flows.
Select the SCJ80X350-50 when you need to commission or fine-tune the stroke end position on a machine without swapping cylinders. For higher force, step up to the 100 mm bore SCJ100 series, which delivers 3927 N of push force at 0.5 MPa. If you need a lower force class, the 63 mm bore SCJ63 provides 1559 N. Choose a fixed-stroke SC series cylinder if your application has a permanent, unchanging stroke length.
This cylinder has a 350 mm nominal stroke. For strokes of this length, carefully evaluate side-loading on the 25 mm rod. If the load is not guided, consider adding an external guide rail or switching to a guided cylinder to prevent rod bending and premature seal wear. A direct replacement must match the 80 mm bore, 350 mm nominal stroke, 50 mm adjust range, PT3/8 ports, and basic mounting style.
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 0.9 MPa, the push force increases to 4523 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
The rear adjusting screw sets the stroke end position, allowing you to shorten the stroke by up to 50 mm from the 350 mm nominal maximum. It is a mechanical end-stop adjustment, not a position-holding or locking device. If air pressure is lost, the piston will not hold its position; an external rod lock or pilot-operated check valve is required for load holding.
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