The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X350-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø63mm bore, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X350-20 delivers 1559 N of push force at 0.5 MPa and 2805 N at the maximum operating pressure of 0.9 MPa, driven by a 20 mm single rod. Its rear-cap adjusting screw provides a 20 mm field-adjustable range, letting you dial in the exact stroke end for commissioning or format changes without removing the cylinder from the machine.
This double-acting tie-rod cylinder uses PT1/4 ports and an M16x1.5 rod thread, with a 28 mm air cushion at each end for smooth deceleration. The body length A(SCJ) is 197 mm, and the standard stroke ceiling for the 63 mm bore is 1500 mm, so this 350 mm unit operates well within the standard envelope.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X350-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 350 mm |
| Stroke adjustment | Up to 20 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, 28 mm |
| Max stroke | Up to 1500 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 | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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. |
|---|---|
| 63 | Bore size in mm. |
| ×350 | Nominal (maximum) stroke length in mm. |
| -20 | 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.
During machine setup, technicians can back out the rear screw to shorten the stroke end in 20 mm increments, quickly dialing in the optimal stop position for a new tooling set without replacing the cylinder.
On packaging lines that switch between box sizes, the adjustable stroke lets operators reposition the pusher end-stop in minutes. The 20 mm range covers multiple SKU variations with one cylinder.
In clamping or pressing fixtures where tooling surfaces wear over time, the stroke-end screw can be advanced to take up the resulting gap, maintaining consistent clamp force without shims or mechanical rework.
Step up to an 80 mm bore when you need more than 1559 N push at 0.5 MPa—the SCJ80 offers 2513 N. If your application does not require field adjustment of the stroke end, the fixed-stroke SC63X350 is a simpler, lower-cost alternative. For a drop-in replacement, match the 63 mm bore, 350 mm nominal stroke, 20 mm adjustable range, PT1/4 ports, and basic mounting; add the -S suffix if a barrel-mounted sensor is needed.
At 350 mm of stroke, the extended rod can experience side-load deflection. If the load is not guided externally, consider adding a guide rail or switching to a guided cylinder to protect the rod bearing and seal from premature wear.
Adjustable-stroke checklist
At 0.5 MPa, push force is 1559 N and pull force is 1402 N (the pull force is lower because the 20 mm rod reduces the piston area on the return side). At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N.
Yes, provided the mounting and port threads match. The SCJ body is slightly longer to house the adjusting screw, so verify the available envelope. The adjustable stroke end is a mechanical stop inside the rear cap—it does not affect the cylinder's force or speed capability.
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.