The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X450-50SH 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. Ø32mm bore, 450mm nominal stroke, PT1/8 ports and adjustable end cushioning.
The SCJ32X450-50SH is a 32 mm bore double-acting single-rod cylinder with a rear adjusting screw that provides up to 50 mm of field-adjustable stroke-end reduction. At 0.5 MPa it delivers 402 N push and 345 N pull, with a 12 mm piston rod and PT1/8 ports, making it a compact yet tunable actuator for mid-reach applications.
This model is built with Viton (FKM) seals for reliable operation in elevated temperatures from 0 to +150 °C, and the integrated magnet (suffix -S) allows direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel. The adjustable cushion decelerates the piston smoothly over the final 21 mm, and the body length A(SCJ) is 182 mm plus stroke.
| Model | Airtac SCJ32 Standard Cylinder SCJ32X450-50SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 450 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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 1000 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 | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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. |
|---|---|
| 32 | Bore size in mm. |
| ×450 | 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.
Dial in the exact end-stop position during machine commissioning with the 50 mm rear screw, eliminating the need to fabricate custom hard stops or shims.
Quickly adjust the stroke end for different product sizes on packaging or assembly lines without dismounting the cylinder, reducing changeover downtime.
Take up mechanical wear in linkages or tooling over time by advancing the stroke end slightly, maintaining precise positioning without replacing parts.
Choose the SCJ32 when you need to fine-tune the stroke end position on the machine without swapping cylinders. If the 402 N push force at 0.5 MPa is marginal, stepping up to the 40 mm bore provides 628 N push. For applications where the stroke is fixed and never needs field adjustment, the standard SC32 fixed-stroke cylinder is a simpler, lower-cost alternative. This 450 mm stroke is within the 1000 mm maximum standard stroke for the 32 mm bore.
For direct replacement, match an SCJ32 with a 450 mm nominal stroke, 50 mm adjust range, PT ports, and the -S magnet option. The Viton seal package (-H) must also be matched if the cylinder operates above 70 °C. At this stroke length, ensure the rod is adequately supported against side loads; consider an external guide rail or switch to a guided cylinder if lateral forces are present.
Adjustable-stroke checklist
At 0.5 MPa air pressure, the push force is 402 N and the pull force is 345 N. At the maximum operating pressure of 0.9 MPa, push force reaches 724 N. The pull force is lower because the 12 mm rod reduces the effective piston area on the return stroke.
Only if you need the adjustable stroke feature. The SCJ32 has a longer body to house the adjusting screw (A dimension 182 mm plus stroke) and the rear screw adds length behind the rear cap. The mounting footprint and port locations are compatible with SC32 accessories in the Basic, FA, LB, and TC/TCM1 mounting styles.
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