Airtac SCJ50 Standard Cylinder SCJ50X100-50STC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X100-50STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 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-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X100-50STC
The SCJ50X100-50STC is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering 982 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides a 50 mm range to fine-tune the stroke end position, making it ideal for commissioning and format changeovers without swapping the cylinder.
This model includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors and a centre trunnion (TC) mount with the TCM1 bracket for pivoting applications. The 20 mm diameter rod and PT1/4 ports handle standard industrial air supplies, while the adjustable air cushion at each end decelerates the piston smoothly.
Airtac SCJ50 Standard Cylinder SCJ50X100-50STC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X100-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 50 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 SCJ50X100-50STC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ50X100-50STC Is Used
Commissioning & Fine-Tuning
The 50 mm adjust range lets technicians dial in the exact stroke end on a new machine during setup, eliminating the need to stock multiple fixed-stroke cylinders for trial-and-error fitting.
Product Format Changeover
Quickly adapt a stopper or pusher station to a new product size by adjusting the rear screw. The trunnion mount allows the cylinder to pivot, accommodating slight alignment changes on the line.
Wear Compensation
In high-cycle clamping or pressing fixtures, the adjustable stroke can be extended slightly over time to compensate for pad or tooling wear, maintaining consistent force application without replacing parts.
Is the Airtac SCJ50 Standard Cylinder SCJ50X100-50STC the Right Cylinder?
Choose the SCJ50X100-50STC when you need to dial in a precise end stop on a 50 mm bore platform. If 982 N of push force at 0.5 MPa is insufficient, stepping up to the 63 mm bore provides 1559 N; for a lighter, more compact solution, the 40 mm bore offers 628 N. The centre trunnion mount is correct for loads that must pivot during the stroke.
For a direct replacement, match the 50 mm bore, 100 mm nominal stroke, 50 mm adjust range, PT port thread, TC mounting style (F-SC50TC), and the integrated magnet. If the application does not require stroke-end adjustment, a fixed-stroke SC50X100S-TC cylinder is a simpler alternative. For strokes of 300 mm or longer, evaluate side-loading and rod bending; an external guide or guided cylinder may be required.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ50X100-50STC FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The maximum push force at the 0.9 MPa operating limit is 1767 N. The theoretical force at 1.0 MPa is 200 kgf. The adjustable stroke screw does not change these force values.
A rear-cap screw sets the stroke end position within a 50 mm range, shortening the nominal 100 mm stroke. This is perfect for applications needing field adjustment. You can replace a fixed-stroke SC50 cylinder with this SCJ model if you need the tuning capability, provided the mounting (TC), magnet, and port thread (PT) match.
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