The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X350-40 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. Ø40mm bore, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X350-40 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, letting you fine-tune the stroke end by up to 40 mm without swapping the unit. Its 40 mm bore delivers 628 N of push force at 0.5 MPa and 1130 N at 0.9 MPa, making it a strong mid-range actuator for positioning tasks.
This model uses a 16 mm diameter piston rod and PT1/4 ports, with an adjustable air cushion to decelerate the load smoothly. The tie-rod body has a length of 185 mm, and the rear adjusting screw provides repeatable stroke-end setting for commissioning, format changes, or wear take-up on production machinery.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X350-40 |
|---|---|
| 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.
| 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.
| 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.
The 40 mm adjust range lets technicians fine-tune the end stop during machine commissioning without changing cylinders, speeding up line start-up.
Quickly adjust the stroke end for different product sizes on packaging or sorting conveyors, reducing downtime between batches.
As tooling or gripper pads wear, the stroke can be extended slightly to maintain precise contact, extending maintenance intervals.
Choose the SCJ40X350-40 when you need to dial in a precise stroke end position within a 40 mm window. If your force requirement grows, stepping up to the 50 mm bore SCJ50 series provides 982 N of push at 0.5 MPa. For applications where the stroke is fixed and never needs field adjustment, the standard SC40 fixed-stroke cylinder is a simpler, cost-effective alternative. At 350 mm of stroke, be mindful of side-loading on the rod; if the load is not guided externally, consider adding a guide rod or switching to a guided cylinder to prevent rod bending. A direct replacement must match the 40 mm bore, 350 mm nominal stroke, 40 mm adjust range, PT port thread, and basic mounting style.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 1130 N. Because it is a single-rod cylinder, the push force is always greater than the pull force.
A screw in the rear cap sets the retracted stroke end position. You can shorten the effective stroke by up to 40 mm from the 350 mm nominal maximum. It does not change the cylinder's force or speed, only the stopping point.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.