The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X150-50 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, 150mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X150-50 is a double-acting, single-rod tie-rod cylinder with a field-adjustable stroke end. Its 80 mm bore delivers a push force of 2513 N at 0.5 MPa, making it a solid mid-range actuator. The rear-cap adjusting screw provides a 50 mm range to shorten the stroke, allowing precise end-position tuning without removing the cylinder.
This model uses a 25 mm diameter piston rod and PT3/8 ports. The adjustable air cushion is 28 mm long, and the SCJ body length A is 239 mm. It operates on 40 µm filtered air from 0.15 to 1.0 MPa and is suited for applications where the stroke must be dialed in during commissioning or after tooling wear.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X150-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 150 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. |
| ×150 | 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, the 50 mm adjustment screw lets technicians fine-tune the actuator's end-stop for perfect alignment with mating parts, eliminating the need to shim or reposition the entire cylinder.
In high-cycle clamping or pressing fixtures, the adjustable stroke can be shortened over time to compensate for pad or tooling wear, maintaining consistent clamp force without replacing the cylinder.
For packaging lines that handle multiple product sizes, the stroke can be quickly adjusted to match different box or pallet dimensions, reducing changeover time compared to swapping fixed-stroke cylinders.
Choose the SCJ80X150-50 when you need to fine-tune the 150 mm stroke end by up to 50 mm on the machine. If the force is too low, stepping up to a 100 mm bore provides 3927 N of push force at the same 0.5 MPa. If a fixed stroke is acceptable, the standard SC80X150 is a simpler, slightly shorter alternative. For a direct replacement, match the 80 mm bore, 150 mm nominal stroke, 50 mm adjust range, PT port thread, and basic mounting. The SCJ series does not support FB flange or CA/CB clevis mounts; use the FA front flange or LB foot mount if a bracket is needed.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The push force is higher because the single rod reduces the piston area on the return side. The maximum push force at the 0.9 MPa operating limit is 4523 N.
Yes, if you need the adjustable stroke feature. The SCJ80X150-50 has the same bore, rod diameter, and port size as an SC80, but the body is slightly longer to house the adjusting screw. Ensure your mounting arrangement can accommodate the extra length and that the 50 mm adjustment range suits your application.
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