Airtac SCJ50 Standard Cylinder SCJ50X450-100S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X450-100S 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, 450mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke450 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X450-100S
The SCJ50X450-100S is a double-acting, single-rod tie-rod cylinder with a 100 mm rear stroke-adjustment screw, allowing you to fine-tune the end position on the fly without swapping the unit. With a 50 mm bore and 20 mm rod, it delivers 982 N of push force at 0.5 MPa and up to 1767 N at 0.9 MPa, making it a solid mid-range actuator for commissioning and format changes.
This model includes a built-in magnet (-S suffix), so you can directly clamp CMSG/DMSG/EMSG reed or solid-state sensors onto the barrel for reliable end-of-stroke detection. The standard PT1/4 port, TPU seals, and 21 mm air cushion ensure smooth deceleration across the 450 mm nominal stroke, which is well within the 1200 mm maximum for this bore.
Airtac SCJ50 Standard Cylinder SCJ50X450-100S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X450-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 450 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 SCJ50X450-100S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×450 | 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 SCJ50X450-100S Is Used
Commissioning & Setup
Dial in the exact 450 mm stroke end-stop during machine bring-up using the 100 mm adjustment screw, eliminating the need for hard stops or spacer machining.
Product Changeover
Quickly adapt the cylinder's extended position for different product sizes on a packaging line without mechanical modifications, reducing downtime between batches.
Wear Compensation
Adjust the stroke end to take up mechanical play or tooling wear over time in clamping and pressing fixtures, maintaining consistent process quality.
Is the Airtac SCJ50 Standard Cylinder SCJ50X450-100S the Right Cylinder?
Step up to a 63 mm bore (1559 N push at 0.5 MPa) if your load exceeds the SCJ50's capacity, or down to 40 mm (628 N) for lighter, more compact tasks. If you do not need field adjustability, a fixed-stroke SC50X450 is a simpler alternative; for high side loads at this 450 mm stroke, consider an external guide rail or a guided cylinder to prevent rod bending. As a direct replacement, match the 50 mm bore, 450 mm nominal stroke, 100 mm adjust range, PT port thread, basic mounting, and the -S magnet option.
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 SCJ50X450-100S FAQ
At 0.5 MPa, it produces 982 N pushing and 825 N pulling. The force increases with pressure, reaching 1767 N push at the maximum operating pressure of 0.9 MPa. The pull force is lower because the 20 mm rod reduces the effective piston area on the return stroke.
Yes, if you need field-adjustable stroke end positioning. The SCJ50X450-100S has the same 50 mm bore and mounting footprint as an SC50, but its body length is slightly longer to house the rear adjusting screw. Ensure your machine has clearance for the extended rear cap and that the 100 mm adjustment range suits your process.
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