The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X100-75STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø50mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X100-75STC is a 50 mm bore double-acting, single-rod cylinder with a field-adjustable stroke end. Its rear adjusting screw provides up to 75 mm of stroke shortening, allowing you to fine-tune the end position from 25 mm to the full 100 mm nominal stroke without swapping the cylinder. With a 20 mm piston rod and PT1/4 ports, it delivers 1767 N of push force at 0.9 MPa.
This model includes a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors and a centre trunnion (TC) mount, supplied with the TCM1 bracket (F-SC50TC), making it ideal for pivoting applications. The standard TPU seal operates reliably from -20 to +70 °C, and the adjustable air cushion at each end ensures smooth deceleration.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X100-75STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 75 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. |
| -75 | 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.
On packaging or filling lines, the 75 mm adjustment lets operators quickly reset the stroke end for different product heights without mechanical stop changes.
Fine-tune the clamping depth on a welding or assembly fixture. The screw sets the exact closure point, preventing part damage from over-travel.
Adjust the end position of a pivoting diverter arm. The TC trunnion mount supports the swinging motion, and the sensor confirms the gate position.
Choose the SCJ50X100-75STC when you need to dial in a precise stroke end position on a pivoting machine member. The centre trunnion mount handles swinging loads, and the 75 mm adjustment range is valuable for commissioning or format changeovers. If your force requirement is lower, the SCJ40 bore provides 1130 N push at 0.9 MPa; for higher force, the SCJ63 delivers 2805 N.
For a direct replacement, match the 50 mm bore, 100 mm nominal stroke, 75 mm adjust range, PT port thread, TC mounting, and magnet option. If the stroke is fixed after setup, a standard SC50X100 cylinder is a simpler alternative. For strokes of 300 mm or more, consider an external guide to manage side loads and prevent rod bending.
Adjustable-stroke checklist
At 0.5 MPa, it provides 982 N push and 825 N pull. 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 adjustable stroke. The SCJ50X100-75STC has the same 50 mm bore and 100 mm maximum stroke. Ensure your mounting matches the TC centre trunnion and that you have the TCM1 bracket. The built-in magnet also requires sensor compatibility.
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