Airtac SCJ50 Standard Cylinder SCJ50X100-30STC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X100-30STC 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. Ø50mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke100 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X100-30STC
The AirTAC SCJ50X100-30STC is a double-acting, single-rod pneumatic cylinder designed for applications where the stroke end position requires fine-tuning on the machine. Its rear-cap adjusting screw provides a 30 mm adjustable range, allowing operators to dial in the exact stroke end for commissioning, format changes, or wear compensation without replacing the cylinder. With a 50 mm bore, it delivers a robust 982 N of push force at 0.5 MPa.
This model features a built-in magnet for easy mounting of CMSG/DMSG/EMSG sensors and a centre trunnion (TC) mount, supplied with the TCM1 bracket, ideal for pivoting applications. The 20 mm diameter piston rod and PT1/4 ports ensure reliable pneumatic performance. The body length A(SCJ) is 194 mm, providing a compact yet powerful solution for adjustable-stroke needs.
Airtac SCJ50 Standard Cylinder SCJ50X100-30STC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X100-30STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 100 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, 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 (Ø50mm)
| 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.
Model Code: Airtac SCJ50 Standard Cylinder SCJ50X100-30STC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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 SCJ50 Standard Cylinder SCJ50X100-30STC Is Used
Commissioning & Setup
The 30 mm adjustable stroke allows technicians to precisely fine-tune the end-stop position during initial machine setup and trials, eliminating the need for multiple fixed-stroke cylinders.
Product Changeover
Quickly adjust the stroke end for different product sizes on a packaging or sorting line. The centre trunnion mount allows the cylinder to pivot, ideal for actuating gates or diverters.
Wear Compensation
In high-cycle clamping or pressing fixtures, the stroke can be incrementally adjusted to compensate for pad or tooling wear, maintaining consistent clamping force without mechanical shims.
Is the Airtac SCJ50 Standard Cylinder SCJ50X100-30STC the Right Cylinder?
Select the SCJ50X100-30STC when your application requires a field-adjustable stroke end within a 30 mm window and a pivoting mount is needed. The centre trunnion (TC) mount, part code F-SC50TC, allows the cylinder to swing, accommodating angular movement. If a higher force is required, consider stepping up to the 63 mm bore SCJ63 series, which offers 1559 N of push force at 0.5 MPa. For a fixed-stroke application without the need for adjustment, the standard SC50 series is a more economical choice.
This cylinder is a direct replacement for another AirTAC SCJ adjustable-stroke cylinder of the same 50 mm bore, 100 mm nominal stroke, and 30 mm adjust range, with a magnet, TC mount, and PT ports. For strokes of 300 mm or more, always assess side-load and rod bending; an external guide or a guided cylinder is recommended to protect the rod and bearings.
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 SCJ50 Standard Cylinder SCJ50X100-30STC FAQ
The theoretical push force at 0.5 MPa is 982 N, and the pull force is 825 N. At the maximum operating pressure of 1.0 MPa, the push force reaches 1964 N. The push force is greater than the pull force because it is a single-rod cylinder.
A rear-cap screw sets the stroke end position, allowing you to shorten the nominal 100 mm stroke by up to 30 mm. Choose the SCJ when you need to fine-tune the stroke on the machine for setup, changeovers, or wear take-up. A fixed-stroke SC cylinder is the better choice when the stroke length is a known, unchanging constant.
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