Airtac SCJ50 Standard Cylinder SCJ50X170-50
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X170-50 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, 170mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke170 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X170-50
The SCJ50X170-50 is a double-acting, single-rod pneumatic cylinder from AirTAC's adjustable-stroke SCJ series, built on a robust tie-rod design. With a 50 mm bore and a nominal stroke of 170 mm, the standout feature is the rear-cap adjusting screw that provides a 50 mm field-adjustable range, allowing you to fine-tune the stroke end position without removing the cylinder from the machine. It delivers a substantial 982 N of push force at a standard 0.5 MPa operating pressure, drawing air through a PT1/4 port.
This model uses a 20 mm diameter piston rod with an M16x1.5 thread for secure tooling attachment and features an adjustable air cushion (21 mm long) for smooth, controlled deceleration. The body length is 194 mm, making it a compact solution for applications requiring mid-range force and on-the-fly stroke adjustment. The default configuration includes a TPU seal for standard temperatures (-20 to +70 °C) and PT threads, ready for immediate integration into your pneumatic system.
Airtac SCJ50 Standard Cylinder SCJ50X170-50 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X170-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 170 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 SCJ50X170-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×170 | 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 SCJ50X170-50 Is Used
Format Changeovers
Quickly adjust the end-stop for different product sizes on packaging or labeling machines without changing the cylinder or adding external hard stops, saving valuable changeover time.
Wear Compensation
Fine-tune the stroke end to compensate for gradual wear on gripper pads, cutting blades, or pressing tools, maintaining consistent process quality over the machine's lifecycle.
Commissioning & Trials
Perfect for R&D and commissioning engineers who need to experimentally dial in the exact stroke length for a new assembly, clamping, or sorting station before locking the setting.
Is the Airtac SCJ50 Standard Cylinder SCJ50X170-50 the Right Cylinder?
Select the SCJ50X170-50 when your application demands a push force of around 982 N at 0.5 MPa and the ability to adjust the stroke end by up to 50 mm. If your force requirements are lower, consider stepping down to the 40 mm bore SCJ40 series, which provides 628 N of push force. For higher force needs, the 63 mm bore SCJ63 series offers a significant jump to 1559 N. This adjustable-stroke model is the ideal choice over a fixed-stroke SC cylinder when you need to compensate for tooling wear, accommodate different part sizes, or fine-tune a machine's end-stop during commissioning. For a direct replacement, ensure the new cylinder matches the 50 mm bore, 170 mm nominal stroke, 50 mm adjust range, PT1/4 port, and basic mounting style.
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 SCJ50X170-50 FAQ
The theoretical push force at 0.5 MPa is 982 N, and the pull force on the retract stroke is 825 N. The force is directly proportional to pressure, reaching a maximum of 1767 N of push force at the 0.9 MPa operating limit. The 50 mm stroke adjustment screw does not alter the cylinder's force output.
A rear-cap screw lets you shorten the stroke end by up to 50 mm from the 170 mm nominal maximum. This allows for precise, on-machine tuning. You can use an SCJ as a direct replacement for an SC if you need this adjustment capability, but you must match the bore, nominal stroke, and port thread. The SCJ is not a locking or holding device.
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