The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X100-20TC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø50mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X100-20TC is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 20 mm of field-adjustable stroke reduction. This allows you to fine-tune the end position during commissioning or format changes without swapping the cylinder. With a 50 mm bore, it delivers 982 N of push force at 0.5 MPa and 1767 N at 0.9 MPa, making it a capable actuator for medium-duty positioning tasks.
This model features a centre trunnion (TC) mount, supplied with the TCM1 bracket, which allows the cylinder to pivot and is ideal for swinging or articulating loads. The 20 mm rod is threaded M16x1.5, and the PT1/4 ports provide a reliable air connection. The body length A(SCJ) is 194 mm, and the adjustable air cushion decelerates the piston smoothly at the end of its 100 mm nominal stroke.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X100-20TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 20 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, 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -20 | 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 retract stroke end position on a clamping fixture during initial setup, accommodating small stack-up tolerances without re-machining any hard stops.
Adjust the stroke of a centre-trunnion-mounted cylinder on a conveyor diverter to perfectly align the gate with different chute widths, enabling quick product changeovers.
Periodically adjust the stroke to compensate for mechanical wear on a press tool or brake pad, maintaining consistent cycle timing and part quality over the machine's life.
Choose the SCJ50X100-20TC when you need to dial in a precise stroke end within a 20 mm window on a pivoting machine member. If your force requirement is lower, the SCJ40 series offers 628 N push at 0.5 MPa; for higher force, the SCJ63 series provides 1559 N. The TC centre trunnion mount is the correct choice for this pivoting action, using the F-SC50TC accessory. For a fixed-stroke application without the need for adjustment, a standard SC50X100 cylinder is a simpler alternative. A direct replacement must match the 50 mm bore, 100 mm nominal stroke, 20 mm adjust range, PT ports, and TC mounting.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 1767 N. The pull force is lower due to the area of the 20 mm piston rod.
Yes, if you need the adjustable stroke feature. The SCJ50X100-20TC has the same bore and nominal stroke but adds a rear adjusting screw. Ensure the overall length is slightly longer to accommodate the mechanism and that you order the correct TC trunnion mount. The port size (PT1/4) and rod thread (M16x1.5) are identical.
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