Airtac SCJ40 Standard Cylinder SCJ40X350-40S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X350-40S 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. Ø40mm bore, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke350 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X350-40S
The SCJ40X350-40S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, providing a 40 mm adjustment range on its 350 mm nominal stroke. This 40 mm bore unit delivers 628 N of push force at 0.5 MPa, making it a capable mid-range actuator for tasks requiring fine positional tuning after installation.
Equipped with a built-in magnet (-S suffix), this model accepts standard CMSG/DMSG/EMSG reed and solid-state sensors directly on its tie-rod barrel for precise end-of-stroke detection. The 16 mm diameter piston rod and PT1/4 ports handle flow efficiently, while the adjustable air cushion at each end decelerates the load smoothly, with a cushion length of 21 mm.
Airtac SCJ40 Standard Cylinder SCJ40X350-40S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X350-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 350 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCJ40 Standard Cylinder SCJ40X350-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 SCJ40 Standard Cylinder SCJ40X350-40S Is Used
Commissioning Fine-Tuning
During machine setup, the 40 mm adjustment screw allows engineers to precisely dial in the end-stop position for a 350 mm stroke actuator, compensating for assembly tolerances without remachining brackets.
Product Changeover
On packaging lines, the adjustable stroke lets operators quickly reset a pusher or diverter's travel from 310 to 350 mm to handle different box sizes, minimizing downtime between batches.
Wear Compensation
In clamping or pressing fixtures, the stroke end can be extended by up to 40 mm over time to take up wear on contact pads or tooling, maintaining consistent clamping force without replacing the cylinder.
Is the Airtac SCJ40 Standard Cylinder SCJ40X350-40S the Right Cylinder?
Choose the SCJ40X350-40S when you need to dial in a 350 mm stroke end position on the machine without swapping cylinders. For higher force, the 50 mm bore SCJ series provides 982 N of push at 0.5 MPa; for a lighter, more compact solution, the 32 mm bore offers 402 N. This adjustable-stroke model is ideal for commissioning and format changes, but if your application requires a fixed, repeatable stroke with no field adjustment, a standard SC fixed-stroke cylinder is a simpler choice. At this 350 mm stroke length, ensure the rod is not subjected to high side loads; an external guide rail or a guided cylinder should be used if lateral forces are present. To replace an existing unit, match the 40 mm bore, 350 mm nominal stroke, 40 mm adjustment range, PT port thread, and the built-in magnet.
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 SCJ40 Standard Cylinder SCJ40X350-40S FAQ
The push force is 628 N at 0.5 MPa and 1130 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the single 16 mm rod, providing 528 N at 0.5 MPa.
A rear-cap adjusting screw shortens the stroke end position by up to 40 mm from the nominal 350 mm maximum. This sets a new mechanical end-stop, allowing the effective stroke to be field-adjusted anywhere between 310 and 350 mm. It does not change the cylinder's force or speed.
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 SCJ40 Standard Cylinder SCJ40X350-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.