Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-75B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-75B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 90mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke90 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 ACQJ20X90-75B
The AirTAC ACQJ20X90-75B is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that restricts the extend travel. You can fine-tune the usable extend range from 15 mm up to the full 90 mm directly on your equipment, while the retract stroke remains completely unaffected. This on-machine tuning eliminates the need to swap cylinders when adjusting end positions.
Because the adjuster only alters stroke length and not the piston area, the output force stays identical to a standard ACQ bore 20 unit, delivering 157.1 N push at 0.5 MPa. This variant includes a male M8x1.25 piston rod end for direct load coupling, a 10 mm rod diameter, and fixed elastomer bumpers at both ends for end-of-stroke deceleration. It operates pneumatically within 0.15-1.0 MPa and lacks a built-in magnet.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-75B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-75B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 90 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 ACQJ20X90-75B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×90 | 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 ACQJ20X90-75B Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC milling fixture, allowing rapid adaptation for different part heights without disassembling the pneumatic setup.
Sorting Diverter Arms
Adjust the extension length of a package diverter on a conveyor line to accommodate varying box sizes during product changeovers.
Laboratory Test Rigs
Set precise trial end positions for repetitive material testing equipment, ensuring the probe contacts the specimen at exact distances.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-75B the Right Cylinder?
If your application only needs a fixed 90 mm extend stroke, a standard ACQ20X90 cylinder will suffice without the external adjuster hardware. When sizing for force, stepping down to a 16 mm bore yields 100.5 N push, whereas stepping up to a 25 mm bore provides 245.4 N push at 0.5 MPa. To order this adjustable unit correctly, confirm the 20 mm bore, 90 mm full stroke, 75 mm adjustment window, the male M8x1.25 rod thread (-B), and note that the -S magnet option is omitted here.
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 ACQJ20X90-75B FAQ
The usable extend range is 15-90 mm (90 mm full stroke minus the 75 mm window). The force is identical to a standard ACQ20: 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 maximum push is 32 kgf at 1.0 MPa. The retract stroke is unaffected.
An external threaded stop with a lock nut (M8x1.25 adjuster thread) limits the extend travel, changing only the stroke length, not the force. Deceleration is handled by fixed elastomer bumpers, not adjustable air cushions. Note that this plain cylinder does not hold its load on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
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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
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