Airtac SCJ50 Standard Cylinder SCJ50X63-30S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X63-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø50mm bore, 63mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke63 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X63-30S
The SCJ50X63-30S is a double-acting, single-rod pneumatic cylinder from AirTAC that puts stroke fine-tuning directly on the machine. A rear-cap adjusting screw lets you shorten the stroke end by up to 30 mm, giving a true working range from 33 mm to the nominal 63 mm without swapping the cylinder. With a 50 mm bore and 20 mm rod, this unit delivers 982 N of push force at 0.5 MPa, rising to 1767 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet, so standard CMSG, DMSG, or EMSG sensors mount directly on the tie-rod barrel for reliable end-of-stroke or mid-stroke sensing. The body length A(SCJ) is 194 mm, and the adjustable air cushion decelerates the piston smoothly at both ends. Ports are PT1/4, and the rod thread is M16x1.5. It is a genuine AirTAC product, ready to ship for commissioning and format-change applications.
Airtac SCJ50 Standard Cylinder SCJ50X63-30S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X63-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 63 mm |
| Stroke adjustment | Up to 30 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 SCJ50X63-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×63 | Nominal (maximum) stroke length in mm. |
| -30 | 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 SCJ50X63-30S Is Used
Commissioning & Setup
Fine-tune the stroke end during machine commissioning without cutting guide rails or manufacturing custom stops. The 30 mm adjustment range allows engineers to dial in the exact 63 mm throw needed for a new pick-and-place sequence.
Multi-Format Packaging
Adjust the pusher stroke on a packaging line when switching between box sizes. The rear screw quickly changes the end position from 63 mm down to 33 mm, eliminating mechanical change parts for short-run batches.
Wear Take-Up
Compensate for gripper pad wear or fixture drift over time. The built-in magnet allows a sensor to confirm the new end position, while the screw maintains a consistent 30 mm adjustment window to restore the original clamping point.
Is the Airtac SCJ50 Standard Cylinder SCJ50X63-30S the Right Cylinder?
Choose the SCJ50 bore when your load needs around 982 N of push force at standard plant air pressure. If you need more force, stepping up to the SCJ63 bore provides 1559 N of push at the same 0.5 MPa. For lighter, faster-moving loads, the SCJ40 bore offers 628 N. The adjustable-stroke feature is the key differentiator from the fixed-stroke SC series—select this SCJ model when your process requires frequent end-position changes, such as during new product trials or multi-format packaging lines. For a direct replacement, match the 50 mm bore, 63 mm nominal stroke, 30 mm adjust range, PT1/4 ports, basic mounting, and the -S magnet option.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ50X63-30S FAQ
Push force is 982 N at 0.5 MPa and 1767 N at 0.9 MPa. Pull force is lower because of the single 20 mm rod—825 N at 0.5 MPa. The 30 mm stroke adjustment screw does not change the force; it only sets the mechanical end position.
Yes, if you need field-adjustable stroke. The SCJ50X63-30S has the same bore, rod, and port dimensions as an SC50 but adds a rear adjusting screw. Ensure your mounting allows for the slightly longer body length A(SCJ) of 194 mm and that the 30 mm adjustment range covers your required stroke variation.
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