Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-75SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-75SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke75 mm
- Port sizeM5×0.8
- Adjuster threadM8×1.25
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-75SB
The AirTAC ACQJ20X75-75SB is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. By turning the M8x1.25 adjuster screw, you can shorten the extend travel anywhere within a usable range of 0 to 75 mm. The retract stroke remains completely unaffected, allowing precise on-machine end-position tuning without swapping parts.
Because the piston area is unchanged, the output force stays identical to a standard ACQ of this bore. At 0.5 MPa, it provides a push force of 157.1 N and a pull force of 117.8 N. This unit includes a male M8x1.25 piston rod end for direct load coupling and a built-in magnet (-S) for position sensing.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-75SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-75SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 75 mm |
| Adjuster thread | M8×1.25 |
| Port size | M5×0.8 |
| 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 – 500 mm/s |
| Rod thread | M5×0.8 (F) / M8×1.25 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 kgf | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-75SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Where the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-75SB Is Used
Machining Fixture Stops
Dial in the exact extend endpoint on a CNC fixture to accommodate varying raw material thicknesses without machining custom spacers.
Carton Changeover
Rapidly reposition the extend stroke on a packaging line when switching between different cardboard box formats and sealing depths.
Prototype Positioning
Establish optimal trial end positions on a new testing rig by tweaking the external stop screw until the desired mechanical contact is found.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-75SB the Right Cylinder?
When sizing this 20mm bore actuator, stepping down to a 16mm bore drops the 0.5 MPa push force to 100.5 N, while stepping up to a 25mm bore raises it to 245.4 N. If your application never requires altering the extend endpoint, a fixed-stroke ACQ cylinder is sufficient. To order this adjustable version correctly, confirm the 20mm bore, 75mm full stroke, 75mm adjustment window, the -S magnet for sensors, and the -B male rod thread.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-75SB FAQ
The usable extend range is 0 to 75 mm. The force is identical to a standard ACQ of this bore: push is 157.1 N and pull is 117.8 N at 0.5 MPa, push is 219.9 N at 0.7 MPa, and max push is 32 kgf at 1.0 MPa.
An external M8x1.25 threaded screw with a lock nut limits the extend stroke only; it changes stroke length, not force. Deceleration is handled by a fixed elastomer bumper at each end. The built-in magnet works with both reed and electronic solid-state switches.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
Request a Quote for Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-75SB
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.