Airtac SCJ50 Standard Cylinder SCJ50X100-75TC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X100-75TC 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. Ø50mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke100 mm
- Stroke adjust-75 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X100-75TC
The SCJ50X100-75TC is a double-acting, single-rod pneumatic cylinder that puts stroke-end adjustment directly on the machine. A rear-cap screw lets you shorten the effective stroke by up to 75 mm without removing the cylinder, which is a practical advantage during commissioning, format changeovers, or when tooling wears and the end position needs a quick tweak. Its 50 mm bore delivers 982 N of push force at 0.5 MPa, backed by a 20 mm piston rod and PT1/4 ports.
This model ships with a centre trunnion (TC) mounting, supplied complete with the TCM1 bracket under code F-SC50TC, so it can pivot in a clevis-style frame. The adjustable air cushion decelerates the piston smoothly at both ends over a 21 mm cushion length, and the standard TPU seals keep it running reliably from -20 to +70 °C. The body length A(SCJ) is 194 mm, slightly longer than a fixed-stroke SC of the same bore to house the adjusting mechanism.
Airtac SCJ50 Standard Cylinder SCJ50X100-75TC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X100-75TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 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 | M16×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCJ50 Standard Cylinder SCJ50X100-75TC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | 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.
Where the Airtac SCJ50 Standard Cylinder SCJ50X100-75TC Is Used
End-Stop Fine-Tuning on Assembly Presses
A 50 mm bore press fitting bushings can use the 75 mm adjustment screw to precisely dial in the final insertion depth for different part batches without reprogramming the PLC or adding external hard stops.
Product Gate with Format Changeover
On a conveyor line, the SCJ50X100-75TC pivots on its trunnion mount to actuate a diverter gate. The adjustable stroke lets operators quickly set the gate opening width for different box sizes during a product changeover.
Clamping with Tooling Wear Compensation
In a welding fixture, this cylinder applies the clamp force. As the clamp pad wears, the 75 mm adjuster can be turned to restore the correct clamping position, extending service intervals without replacing the cylinder or machining new stops.
Is the Airtac SCJ50 Standard Cylinder SCJ50X100-75TC the Right Cylinder?
Choose the SCJ50X100-75TC when you need a 50 mm bore with a nominal 100 mm reach and the ability to dial the stroke end back by up to 75 mm in the field. If your force requirement is lower, stepping down to a 40 mm bore (628 N push at 0.5 MPa) saves space; for heavier loads, the 63 mm bore provides 1559 N push. The centre trunnion mount is ideal for applications where the cylinder body needs to swing, but if you require a rigid, fixed installation, consider the basic or LB foot-mounted SCJ variant instead.
For direct replacement, match the 50 mm bore, 100 mm nominal stroke, 75 mm adjustment range, PT port thread, and TC mounting with TCM1 bracket. If your application involves a stroke of 100 mm or more and the rod is pushing an unguided load, verify side-load limits or add an external guide rail to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-75)
- ✓ 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 SCJ50 Standard Cylinder SCJ50X100-75TC FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. Because it is a single-rod cylinder, the push force is greater than the pull force due to the rod area. At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N.
A rear-cap adjusting screw sets the stroke end position, allowing the effective stroke to be shortened by up to 75 mm from the nominal 100 mm. It can replace an SC fixed-stroke cylinder if you need field adjustability, provided the bore, port thread, and mounting style match. The SCJ body is slightly longer to accommodate the screw mechanism.
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