The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X100-75STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø40mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X100-75STC is a 40 mm bore double-acting single-rod cylinder with a rear adjusting screw that lets you fine-tune the stroke end by up to 75 mm without removing the unit. At 0.5 MPa it delivers 628 N push and 528 N pull, giving a useful force margin for light-to-medium automation tasks.
This model includes a built-in magnet (S suffix) for CMSG/DMSG sensors and a centre trunnion mount (TC suffix) with the TCM1 bracket for pivoting applications. The 16 mm rod, PT1/4 ports and 21 mm air cushion are standard for the 40 bore, and the body length A is 185 mm plus the adjusting screw extension.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X100-75STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 75 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. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -75 | 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.
Field technicians can back off the rear screw to slowly increase stroke during initial machine setup, eliminating the need to stock multiple fixed-stroke cylinders for trial runs.
On packaging lines, operators adjust the stroke end to match different box sizes or pallet heights without stopping production for a cylinder swap.
In clamping fixtures, the adjustable stroke takes up pad wear over time. A quick turn of the screw restores full clamping travel without replacing the actuator.
Choose the SCJ40 when you need to dial in a precise end position during commissioning or changeovers—the 75 mm adjustment range covers most fine-tuning needs. If 628 N push is marginal, stepping up to the 50 mm bore SCJ50 series provides 982 N push at the same pressure. For fixed-stroke applications where adjustment is never needed, the standard SC40 cylinder is a simpler alternative.
To replace an existing SCJ40X100-75STC, match the bore, 100 mm nominal stroke, 75 mm adjust range, PT ports, centre trunnion (TC) mounting, and magnet option. For strokes of 100 mm, side-loading is usually minimal, but always align the rod with the load axis to prevent premature seal wear.
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, push force reaches 1130 N. The pull force is always lower because the rod reduces the effective piston area on the return stroke.
Yes, if you need field-adjustable stroke. The SCJ40X100-75STC has the same bore, rod size, and port thread as an SC40, but the body is slightly longer to house the adjusting screw. Ensure the 75 mm adjustment range and the TC centre trunnion mounting suit your machine layout.
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.