The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X85-10 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø63mm bore, 85mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X85-10 is a double-acting, single-rod pneumatic cylinder that puts a 10 mm field-adjustable stroke end at your fingertips. With a 63 mm bore, it delivers 1559 N of push force at 0.5 MPa, making it a solid mid-range actuator for tasks that need a precise mechanical stop. The rear-cap adjusting screw lets you shorten the stroke by up to 10 mm without dismounting the cylinder, which is ideal for commissioning tweaks or taking up wear on a tooling stop.
This model uses a 20 mm diameter piston rod and PT1/4 ports, with a built-in adjustable air cushion (28 mm long) to decelerate the load smoothly. The body length A(SCJ) is 197 mm, slightly longer than a fixed-stroke SC of the same bore to accommodate the adjusting mechanism. It operates on filtered air from 0.15 to 1.0 MPa and can handle speeds of 30-800 mm/s.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X85-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 85 mm |
| Stroke adjustment | Up to 10 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. |
| ×85 | Nominal (maximum) stroke length in mm. |
| -10 | 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.
Use the 10 mm rear adjuster to fine-tune the end-of-stroke position during machine commissioning without swapping cylinders or machining external hard stops. The 1559 N push force handles clamping and pressing fixtures with ease.
Adjust the stroke end quickly when switching between product sizes on a packaging line. The SCJ63X85-10 lets operators dial in a new stop position for different box heights or case sizes in seconds.
As tooling or gripper pads wear over time, the stroke-end screw can be advanced to take up the slack, maintaining consistent part contact and process quality without replacing the entire actuator.
Choose the SCJ63X85-10 when you need to dial in a stroke end position on a 63 mm bore platform. If 1559 N of push force is more than your application requires, stepping down to a 40 mm bore SCJ drops the push force to 628 N at 0.5 MPa; for heavier loads, the 80 mm bore provides 2513 N. This adjustable-stroke model is the right call for format changeovers or end-stop fine-tuning, but if your stroke length is fixed and never needs field adjustment, the standard SC63X85 fixed-stroke cylinder is a simpler, more cost-effective alternative. For a direct replacement, match the 63 mm bore, 85 mm nominal stroke, 10 mm adjust range, PT port thread, and basic mounting. If you need to add position sensing later, order the -S magnet version to accept CMSG/DMSG sensors.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N (the difference is due to the 20 mm rod area). At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N. The theoretical maximum at 1.0 MPa is 318 kgf.
Yes, the SCJ63X85-10 is dimensionally compatible as a replacement, provided you have clearance for the slightly longer rear adjusting screw housing. The mounting, port size (PT1/4), and rod thread (M16x1.5) are identical. You gain the ability to shorten the stroke end by up to 10 mm, but the nominal 85 mm stroke remains the maximum.
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