Airtac SCJ50 Standard Cylinder SCJ50X300-100S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X300-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø50mm bore, 300mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke300 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X300-100S
The SCJ50X300-100S is a double-acting, single-rod pneumatic cylinder with a 50 mm bore and a 300 mm nominal stroke, featuring a rear-cap adjusting screw that provides a 100 mm field-adjustable stroke range. This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG/DMSG/EMSG sensors along the barrel for precise end-of-stroke detection without external brackets. With a 20 mm diameter piston rod and PT1/4 ports, it delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it a versatile actuator for mid-range automation tasks.
At its maximum operating pressure of 0.9 MPa, the push thrust reaches 1767 N, offering substantial power for clamping, pressing, or ejecting. The adjustable stroke end is set via a mechanical screw, enabling operators to fine-tune the piston's stop position during commissioning or format changeovers without swapping the cylinder. The tie-rod construction simplifies maintenance, and the standard TPU seals ensure reliable operation within a -20 to +70 °C temperature range, with an adjustable air cushion decelerating the piston to reduce end-of-stroke impact.
Airtac SCJ50 Standard Cylinder SCJ50X300-100S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X300-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 100 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 SCJ50X300-100S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×300 | Nominal (maximum) stroke length in mm. |
| -100 | 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 SCJ50X300-100S Is Used
Commissioning & Process Tuning
The 100 mm adjustment range allows process engineers to dial in the exact stroke end position during initial machine setup, accommodating variations in tooling or workpiece placement without machining new stops.
Product Format Changeover
On packaging or assembly lines running multiple product sizes, operators can quickly reset the cylinder's stroke end via the rear screw to match a new box height or component position, minimizing downtime between batches.
Wear Compensation in Clamping
In clamping or pressing fixtures where pads or tooling surfaces wear over time, the adjustable stroke lets maintenance staff advance the end position to restore proper clamping force and grip without replacing the cylinder.
Is the Airtac SCJ50 Standard Cylinder SCJ50X300-100S the Right Cylinder?
Choose the SCJ50X300-100S when you need a 50 mm bore actuator with a long 300 mm nominal stroke and the flexibility to reduce the stroke end by up to 100 mm on the machine. For applications requiring more force, stepping up to the 63 mm bore (SCJ63 series) provides 1559 N of push force at 0.5 MPa, while a step down to the 40 mm bore (SCJ40 series) offers 628 N for lighter, more compact installations. If your application does not require stroke adjustability, the fixed-stroke SC50X300-S is a direct alternative with the same bore, stroke, and magnet option.
For this 300 mm stroke length, be mindful of side loads which can cause rod bending or premature seal wear; if the load is not guided externally, consider pairing the cylinder with a linear guide or switching to a guided cylinder series. This model is a direct replacement for any AirTAC SCJ50X300-100S with PT ports and a magnet, matching the identical bore, nominal stroke, and 100 mm adjustment range. The built-in magnet is ready for CMSG/DMSG sensors; the basic mounting style provides a clean barrel for custom fixture clamps or mounting in a trunnion bracket if needed later.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ 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 SCJ50X300-100S FAQ
At the standard 0.5 MPa operating pressure, this 50 mm bore cylinder produces 982 N of push force and 825 N of pull force. The push force increases to 1767 N at the maximum operating pressure of 0.9 MPa. The adjustable stroke screw does not alter the cylinder's force output.
A rear-cap adjusting screw sets the piston's end-of-stroke position, allowing you to shorten the stroke by up to 100 mm from the 300 mm nominal maximum. Choose the SCJ when you need to fine-tune the stroke on the machine for commissioning, format changes, or wear take-up. If your application requires a fixed, unchanging stroke, the standard SC series is a simpler, more cost-effective choice.
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