The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X70-30TC 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. Ø63mm bore, 70mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X70-30TC is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. Its rear-cap adjusting screw provides up to 30 mm of adjustment, letting you dial in the exact stop position during commissioning or format changes without swapping the cylinder. With a 63 mm bore and 20 mm rod, it delivers 1559 N of push force at 0.5 MPa, making it a solid mid-range actuator for tasks like clamping, pressing, and diverting.
This model is configured with a TC centre trunnion mount (supplied with the TCM1 bracket, order code F-SC63TC), allowing the cylinder to pivot as it strokes—ideal for swinging gates or articulated linkages. The 28 mm air cushion at each end decelerates the piston quietly, and the PT1/4 ports connect easily to standard pneumatic plumbing. The body length A for this SCJ series is 197 mm, providing a compact footprint for its force class.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X70-30TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 70 mm |
| Stroke adjustment | Up to 30 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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. |
|---|---|
| 63 | Bore size in mm. |
| ×70 | 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.
Use the 30 mm adjustment screw to precisely set the end-of-stroke position during machine setup, eliminating the need for external hard stops and reducing commissioning time.
Quickly adjust the stroke to accommodate different product sizes on a packaging or sorting line. The TC trunnion mount allows the cylinder to pivot, perfect for actuating a diverter gate.
In high-cycle clamping or pressing fixtures, the adjustable stroke can be extended slightly over time to compensate for pad or tooling wear, maintaining consistent clamping force without replacing parts.
Choose the SCJ63 when you need the force of a 63 mm bore (1559 N push at 0.5 MPa) but also require field-adjustable stroke control. If your application demands more force, stepping up to an 80 mm bore provides 2513 N of push at the same pressure. For applications needing less force in a smaller package, the 50 mm bore delivers 982 N. The adjustable stroke is the key differentiator; if your stroke is fixed and never changes, a standard SC63 fixed-stroke cylinder is a simpler, more economical choice.
For direct replacement, match the 63 mm bore, 70 mm nominal stroke, 30 mm adjustment range, PT port thread, and TC centre trunnion mounting. This SCJ model does not include a magnet, so if you need piston position sensing, select the -S magnet option and add compatible CMSG/DMSG sensors. For strokes over 300 mm, be mindful of side loading on the 20 mm rod; an external guide rail or a switch to a guided cylinder is recommended to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. The maximum push force at 0.9 MPa is 2805 N. The adjustable stroke screw does not change the cylinder's force output.
It can, provided the bore (63 mm), nominal stroke (70 mm), port thread (PT), and mounting style (TC centre trunnion) all match. The key advantage is the 30 mm adjustable stroke range, which allows you to fine-tune the end position. Ensure the slightly longer body length (197 mm for the SCJ series) fits your machine envelope.
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