Airtac SCJ40 Standard Cylinder SCJ40X80-30TC
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X80-30TC 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. Ø40mm bore, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke80 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X80-30TC
The SCJ40X80-30TC is a double-acting, single-rod pneumatic cylinder from the AirTAC SCJ adjustable-stroke family, delivering 628 N of push force at 0.5 MPa. Its defining feature is a rear-cap adjusting screw that provides up to 30 mm of field-adjustable stroke reduction, allowing machine builders to fine-tune the end position without swapping the cylinder. The 40 mm bore uses a 16 mm diameter piston rod and PT1/4 ports.
This model is configured with a TC centre trunnion mount, making it ideal for applications where the cylinder body needs to pivot. The trunnion bracket (supplied as TCM1, ordered together as part F-SC40TC) allows the cylinder to swing through an arc, accommodating angular movement of the attached load. The standard TPU seals provide reliable operation from -20 to +70 °C, and the 21 mm air cushion at each end ensures quiet, controlled deceleration.
Airtac SCJ40 Standard Cylinder SCJ40X80-30TC Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X80-30TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 80 mm |
| Stroke adjustment | Up to 30 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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, 21 mm |
| Max stroke | Up to 1200 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.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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.
Model Code: Airtac SCJ40 Standard Cylinder SCJ40X80-30TC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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.
Where the Airtac SCJ40 Standard Cylinder SCJ40X80-30TC Is Used
Commissioning & Fine-Tuning
During machine setup, the 30 mm adjusting screw lets technicians precisely dial in the actuator's end stop for perfect alignment with tooling or fixtures, eliminating the need for shims or custom spacers.
Product Format Changeover
On packaging or sorting lines, the stroke can be quickly adjusted to handle different product sizes or spacing requirements without mechanical disassembly, significantly reducing changeover time.
Wear Compensation
In high-cycle clamping or pressing operations, the adjustable stroke end can be periodically tweaked to compensate for pad or tooling wear, maintaining consistent applied pressure and cycle quality over time.
Is the Airtac SCJ40 Standard Cylinder SCJ40X80-30TC the Right Cylinder?
Choose the SCJ40X80-30TC when you need a compact, field-adjustable stroke end within a 30 mm window. If your force requirements increase, stepping up to the 50 mm bore SCJ50 provides 982 N of push at 0.5 MPa. For applications where the stroke length is fixed and never needs field adjustment, the standard SC40 fixed-stroke cylinder is a simpler, cost-effective alternative. This adjustable-stroke model is a direct replacement for an existing AirTAC SCJ40 cylinder with an 80 mm nominal stroke, 30 mm adjust range, PT ports, and TC mount. Always verify the trunnion pin centre distance matches your existing setup.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ40 Standard Cylinder SCJ40X80-30TC FAQ
The theoretical push force at 0.5 MPa is 628 N, and the pull force (accounting for the 16 mm rod) is 528 N. At the maximum operating pressure of 1.0 MPa, the push force reaches 1256 N. The rear adjusting screw only changes the stroke end position and does not alter the cylinder's output force.
You can, provided the slightly longer body length A(SCJ) of 185 mm fits your space envelope. The SCJ adds a rear adjusting screw for field-adjustable stroke, whereas the SC is a fixed-stroke cylinder. Both share the same mounting accessories, port sizes, and force characteristics for a given bore and pressure.
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