Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-50B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-50B 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 ACQJ20X90-50B
The AirTAC ACQJ20X90-50B is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend range from 40 mm up to the full 90 mm directly on your machinery, shortening the stroke by up to a 50 mm window without swapping components. The retract stroke remains completely unaffected by this adjustment.
Because the piston area stays the same, output force is identical to a standard ACQ of this bore, delivering 157.1 N push at 0.5 MPa. This male-rod variant features an M8x1.25 thread on the piston rod for direct load coupling. The body includes magnetic-switch grooves, though this specific SKU ships without a magnet, and it relies on fixed elastomer bumpers at both ends rather than adjustable air cushions.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-50B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-50B |
|---|---|
| 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 ACQJ20X90-50B
| 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 ACQJ20X90-50B Is Used
Machining Fixture Stops
Dial in the exact extend position from 40 to 90 mm on a CNC machining fixture to accommodate raw part tolerances without machining new stop blocks.
Product Changeover Pins
Rapidly reposition the extend stroke on a packaging line during format changes, using the external M8x1.25 adjuster to set new product push-off distances.
Assembly Press Trials
Test different engagement depths on an electronic board assembly press by tweaking the rod extension limit, preventing damage during prototype runs.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-50B the Right Cylinder?
Choosing this 20 mm bore provides 157.1 N push force at 0.5 MPa. If your application requires less force, stepping down to a 16 mm bore yields 100.5 N push, while moving up to a 25 mm bore provides 245.4 N push. A fixed-stroke ACQ cylinder is sufficient if your end position never requires alteration. When ordering, confirm the 90 mm full stroke, the 50 mm adjuster window, the male M8x1.25 rod thread, and the absence of the S magnet option.
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 ACQJ20X90-50B FAQ
It provides 157.1 N push and 117.8 N pull at 0.5 MPa, 219.9 N push at 0.7 MPa, and a maximum push of 32 kgf at 1.0 MPa. The usable extend range is 40-90 mm, created by a 50 mm adjustment window on the 90 mm full stroke.
The external M8x1.25 threaded stop with lock nut physically limits how far the rod extends, changing stroke length only without altering piston area or force. The cylinder uses fixed elastomer bumpers instead of adjustable cushions, and because it lacks a rod lock, the load will drift if air pressure is lost.
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
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