Airtac SCJ50 Standard Cylinder SCJ50X500-40
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X500-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø50mm bore, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke500 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X500-40
The SCJ50X500-40 is a double-acting, single-rod pneumatic cylinder with a 50 mm bore and a 500 mm nominal stroke, featuring a rear-cap adjusting screw that provides up to 40 mm of field-adjustable stroke-end reduction. This allows precise mechanical tuning of the piston stop position without replacing the cylinder or adding external hard stops, making it ideal for applications requiring fine positional adjustment during commissioning or format changes. With a 20 mm diameter piston rod and PT1/4 ports, it delivers a robust push force of 982 N at 0.5 MPa.
Built on a durable tie-rod construction with an adjustable air cushion, this cylinder operates smoothly within a speed range of 30-800 mm/s. The body length A dimension for the SCJ50 configuration is 194 mm, providing a compact footprint for its stroke class. The standard TPU seal ensures reliable performance in temperatures from -20 to +70 °C, while the default PT thread offers straightforward pneumatic connections for general industrial automation tasks.
Airtac SCJ50 Standard Cylinder SCJ50X500-40 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X500-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 500 mm |
| Stroke adjustment | Up to 40 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 SCJ50X500-40
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×500 | Nominal (maximum) stroke length in mm. |
| -40 | 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 SCJ50X500-40 Is Used
Commissioning Fine-Tuning
Adjust the stroke end by up to 40 mm on the machine during initial setup to perfectly align the cylinder's stop position with tooling or fixtures, eliminating the need for shims or custom spacers.
Wear Compensation
In high-cycle clamping or pressing operations, use the adjusting screw to periodically take up mechanical slack caused by pad or workpiece wear, maintaining consistent clamping force without reprogramming.
Format Changeover
Quickly adapt to different product sizes on a packaging line by manually adjusting the stroke end, allowing a single cylinder model to handle multiple box or carton dimensions with a simple mechanical change.
Is the Airtac SCJ50 Standard Cylinder SCJ50X500-40 the Right Cylinder?
Select the SCJ50X500-40 when you need to fine-tune the end position of a 50 mm bore cylinder over a 40 mm range, such as in conveyor stops or material handling gates. For applications requiring higher force, consider stepping up to the 63 mm bore SCJ63 series, which provides 1559 N of push force at 0.5 MPa. If a fixed, non-adjustable stroke is sufficient, the standard SC50X500 offers a simpler, more cost-effective solution. As a direct replacement, ensure the new unit matches the 50 mm bore, 500 mm nominal stroke, 40 mm adjust range, PT1/4 ports, and basic mounting. For strokes of 500 mm, be mindful of side-loading on the 20 mm rod; an external guide rail or a guided cylinder is recommended if the load is not perfectly axial to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ 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 SCJ50X500-40 FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N, due to the area of the 20 mm piston rod. The maximum push force at the 0.9 MPa operating limit is 1767 N.
The SCJ50X500-40 includes a rear adjusting screw that shortens the stroke end by up to 40 mm, allowing field adjustment. The standard SC50X500 has a fixed 500 mm stroke. Choose the SCJ when you need to fine-tune the end position without changing the cylinder.
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