Airtac SCJ50 Standard Cylinder SCJ50X175-40S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X175-40S 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, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke175 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X175-40S
The SCJ50X175-40S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the extension by up to 40 mm without replacing the unit. Its 50 mm bore delivers 982 N of push force at 0.5 MPa, making it a capable mid-range actuator for tasks that need repeatable end-position tweaking.
This model includes a built-in magnet (-S), so you can clamp CMSG, DMSG, or EMSG reed or solid-state sensors directly onto the tie-rod barrel for reliable end-of-stroke detection. The 20 mm piston rod and PT1/4 ports keep it compatible with standard AirTAC SCJ accessories, and the adjustable air cushion at both ends helps manage deceleration across its 30-800 mm/s speed range.
Airtac SCJ50 Standard Cylinder SCJ50X175-40S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X175-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 175 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 SCJ50X175-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×175 | 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 SCJ50X175-40S Is Used
Commissioning & Setup
Fine-tune the end-stop position during initial machine setup by adjusting the rear screw, eliminating the need to fabricate custom shims or external hard stops.
Format Changeovers
Quickly adapt a diverter or stop gate for different product sizes on a packaging line by changing the stroke end within the 40 mm range, minimizing downtime.
Wear Compensation
Take up mechanical play in a clamping or pressing fixture over time by incrementally advancing the stroke end, maintaining consistent contact force without replacing parts.
Is the Airtac SCJ50 Standard Cylinder SCJ50X175-40S the Right Cylinder?
Choose the SCJ50X175-40S when you need to dial in a precise stroke end during commissioning or format changes. If 982 N of push force at 0.5 MPa is marginal, stepping up to the 63 mm bore provides 1559 N, while the 40 mm bore offers 628 N if space is tight. For applications where the stroke length is permanently fixed and never needs adjustment, a standard SC fixed-stroke cylinder is a simpler, more cost-effective alternative.
To replace this unit, match the 50 mm bore, 175 mm nominal stroke, 40 mm adjust range, PT port thread, and the -S magnet option. Since this is a 175 mm stroke, ensure the rod is not subjected to high side loads; if lateral forces are present, add an external guide rail or consider a guided cylinder 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 SCJ50X175-40S FAQ
A screw in the rear cap sets the piston's end position. Turning it shortens the stroke by up to 40 mm from the 175 mm nominal maximum. This is a mechanical stop for the stroke end only; it does not adjust the cylinder's force or speed.
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The pull force is lower because the 20 mm piston rod reduces the effective area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 1767 N.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SCJ Adjustable-Stroke Cylinders
Request a Quote for Airtac SCJ50 Standard Cylinder SCJ50X175-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.