The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X75-50TC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø40mm bore, 75mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X75-50TC is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. Its rear adjusting screw provides up to 50 mm of adjustment from the 75 mm nominal stroke, so commissioning engineers can dial in the exact stopping position without swapping cylinders or adding external hard stops. The 40 mm bore delivers 628 N of push force at 0.5 MPa, with a 16 mm piston rod and PT1/4 ports.
This model is configured with a TC centre trunnion mount (F-SC40TC), which ships with the TCM1 bracket and allows the cylinder to pivot, making it ideal for swinging or articulating loads. The body length A(SCJ) is 185 mm, slightly longer than a fixed-stroke SC of the same bore to accommodate the adjusting mechanism. It operates on 40 µm filtered air from 0.15 to 1.0 MPa and includes an adjustable air cushion for smooth deceleration.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X75-50TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 75 mm |
| Stroke adjustment | Up to 50 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. |
| ×75 | Nominal (maximum) stroke length in mm. |
| -50 | 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.
Quickly adjust the end stop for different product sizes on a packaging machine without mechanical modifications.
Take up mechanical play in a clamping or pressing station by advancing the stroke end as tooling wears.
Iterate on the optimal actuator stroke during R&D trials, then lock in the setting for production.
Choose the SCJ40X75-50TC when you need to commission a machine with a precise, field-adjustable stroke end. If 628 N of push force is insufficient, stepping up to the 50 mm bore provides 982 N at the same pressure. For applications where the stroke must never be changed after setting, a fixed-stroke SC cylinder is a simpler, more cost-effective choice. This TC trunnion-mounted unit directly replaces another AirTAC SCJ40 with a 75 mm nominal stroke, 50 mm adjust range, PT ports, and the same mounting configuration.
Adjustable-stroke checklist
At 0.5 MPa, it delivers 628 N pushing and 528 N pulling. The push force is higher because the single rod reduces the piston area on the return side.
Yes, if you need up to 50 mm of stroke adjustment. The SCJ40 has the same bore and rod dimensions but a slightly longer body (185 mm) to house the rear adjusting screw.
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.