The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X85-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø80mm bore, 85mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X85-30S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, giving you a 30 mm fine-tuning range on the 85 mm nominal stroke. With an 80 mm bore, it delivers 2513 N of push force at 0.5 MPa, making it a solid mid-range actuator for pressing, clamping, and positioning tasks where you need to dial in the exact end point during commissioning or format changes.
This model includes a built-in magnet (S) so you can directly clamp CMSG, DMSG, or EMSG reed and solid-state sensors onto the tie-rod barrel for end-of-stroke detection. The 25 mm rod diameter and PT3/8 ports handle flow well, while the 28 mm air cushion decelerates the piston smoothly. The body length A is 239 mm, longer than the fixed-stroke SC to house the rear adjusting screw.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X85-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 85 mm |
| Stroke adjustment | Up to 30 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. |
| ×85 | Nominal (maximum) stroke length in mm. |
| -30 | 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.
Fine-tune the stroke end by up to 30 mm during machine commissioning to perfectly align with mating tooling or stops, eliminating the need for shims or external hard stops.
Quickly adjust the push stroke for different product sizes on a packaging or sorting line. The rear screw lets operators change the stroke end in seconds without dismounting the cylinder.
In high-cycle clamping fixtures, use the 30 mm adjustment to take up mechanical wear on pads or tooling over time, maintaining consistent clamp force and position without reprogramming.
Choose the SCJ80X85-30S when you need to fine-tune the stroke end without swapping cylinders. If your force requirement is lower, step down to the 63 mm bore (1559 N push at 0.5 MPa); for heavier loads, the 100 mm bore offers 3927 N. If you don't need stroke adjustability, the fixed-stroke SC80 is a simpler, slightly shorter alternative. For a direct replacement, match the 80 mm bore, 85 mm nominal stroke, 30 mm adjust range, PT port thread, basic mounting, and the magnet option (-S).
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N (reduced by the 25 mm rod area). At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N. The adjusting screw does not change the force output.
Only if you do not need the stroke-end adjustment feature. The SC80 is a fixed-stroke cylinder with an identical bore and force output but lacks the rear adjusting screw. The SCJ body is slightly longer to accommodate this mechanism.
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