The AirTAC Airtac SDAJ80~100 Adjustable Super Slim Cylinder SDAJ100X20-20S is a genuine double-acting COMPACT cylinder (Ø100mm bore) whose extend end-position is set by an external M27×2.0 adjustment screw. You can dial the stroke anywhere from 0 to 20 mm on the machine — no shims, no part change.
The SDAJ100X20-20S is a compact double-acting single-rod cylinder featuring an external adjustable extend stop. Turning the R (M27x2.0) screw lets you dial the outward stroke down from 20mm to 0mm directly on the machine, eliminating the need for shims or part swaps during changeovers. Because the adjuster only sets the mechanical stop position, the output force remains identical to a standard SDA of this bore, delivering 3927 N of push at 0.5 MPa.
This 100mm bore unit saves valuable axial mounting depth where larger profile cylinders cannot fit, utilizing a short riveted body design. It includes a built-in piston magnet (-S) for direct mounting of AirTAC reed or electronic switches along the body grooves. End-of-travel deceleration is handled by a fixed NBR bumper at each end, which absorbs shock but is not an adjustable air cushion.
| Model | Airtac SDAJ80~100 Adjustable Super Slim Cylinder SDAJ100X20-20S |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø100 mm |
| Max stroke | 20 mm |
| Adjustable range | 0 – 20 mm |
| Adjuster thread (R) | M27×2.0 |
| Port size | PT3/8 |
| Acting type | Double acting |
|---|---|
| Rod end thread | M18×1.5 F / M26×1.5 male (B) |
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Fixed NBR bumper (both ends) |
The adjustment screw shortens the extend stroke by up to 20 mm. Force is unchanged from a standard SDA of the same bore. Specifications follow the official AirTAC SDAJ datasheet.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3525 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Force matches a standard SDA of the same bore; the adjuster only sets the stop position, not the area. Actual usable force is lower than theoretical due to friction.
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 100 | Bore size in mm. |
| ×20 | Maximum stroke length in mm. |
| -20 | Adjustable window (10/20/30/40/50/75/100 mm). |
| S / B | S = magnet; B = male-thread rod (both optional). |
Thread: PT standard. Related SDA-family variants: SDA (fixed stroke), SDAD (double rod), SSA/STA (single acting), SDAT (duplex), SDAW (duplex-end).
Dial the 0-20mm extend stop to precisely seat heavy bearings without overshooting, leveraging the 3927 N push force for stubborn components.
Quickly readjust the outward stroke on the production line for varying material thicknesses, using the R screw to set new endpoints instantly.
Lift loads up to 200.2 kg with a 2:1 safety margin, tweaking the extend position to match varying stack heights without changing hardware.
When sizing this model, consider the force boundaries: stepping down to an SDAJ80 yields 2513.3 N of push at 0.5 MPa, while this 100mm bore provides 3927 N. Based on the 0.5 MPa push figure, the safe working load is approximately 2356 N (about 60% capacity), translating to a vertical lift capability of roughly 200.2 kg with a 2:1 safety margin. Choose this 100mm option when your application demands high force within a tight footprint.
This cylinder is ideal for setups requiring frequent on-site stroke tuning between 0 and 20mm. Remember that a plain SDAJ does not hold position or load when air is lost or the valve is centered; the fixed bumper only decelerates near the end of the stroke. For load holding without live pressure, integrate an external rod lock or a pilot-operated check valve. This configuration features a 100mm bore, 20mm stroke, 20mm adjust window, PT3/8 port, a built-in magnet (S), and a female M18x1.5 rod-end thread.
Quick checklist
At 0.5 MPa, the push force is 3927 N and the pull force is 3524.9 N. At 0.7 MPa, push is 5497.8 N and pull is 4934.8 N. The theoretical maximum push force is 801 kgf at 1.0 MPa.
The M27x2.0 adjuster screw mechanically shortens the extend stroke from 20mm down to 0mm without altering the output force. The built-in -S magnet allows you to track piston position using AirTAC reed or electronic switches mounted in the body grooves.
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