Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 80mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke80 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 ACQJ20X80-40SB
The AirTAC ACQJ20X80-40SB is a double-acting JIS compact cylinder with an external stroke adjuster. A threaded stop and lock nut on the rod-end side restricts how far the rod extends, providing a usable extend range of 40 to 80 mm from the 80 mm full stroke. Retract movement remains completely unaffected. Because the piston area is unchanged, force output is identical to a standard ACQ of this bore.
This unit includes a male M8x1.25 rod end (-B) for direct load coupling and a built-in magnet (-S) for position sensing. It pushes with 157.1 N at 0.5 MPa and 219.9 N at 0.7 MPa, reaching a maximum push of 32 kgf at 1.0 MPa. The body features fixed elastomer bumpers for end-of-stroke deceleration and integrated grooves compatible with reed or solid-state switches.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 80 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 ACQJ20X80-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 ACQJ20X80-40SB Is Used
Machine Tending Setup
Dial in the exact 40-80 mm extend position during initial robot fixture alignment without machining custom spacers.
Product Changeover Stops
Quickly modify the extend endpoint on packaging lines when switching to a different carton size or package depth.
Lab Trial End Positions
Test various extend lengths on a clamping jig to find the optimal reach before finalizing a fixed-stroke design.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X80-40SB the Right Cylinder?
If 117.8 N of pull force at 0.5 MPa is insufficient, stepping up to the 25 mm bore yields 245.4 N push. Conversely, the 16 mm bore provides 100.5 N push if a smaller footprint is acceptable. A fixed-stroke ACQ20X80 is adequate if your extend position never needs field adjustments. When ordering this adjustable variant, confirm the 20 mm bore, 80 mm full stroke, 40 mm adjustment window, magnet (-S), and male rod thread (-B).
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 ACQJ20X80-40SB FAQ
It delivers 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 full stroke is 80 mm, and the external M8x1.25 adjuster allows the extend stroke to be shortened by up to 40 mm, yielding a usable extend range of 40-80 mm.
The external threaded stop changes only the extend stroke length; it does not alter piston area, so force remains identical to a standard ACQ20. The cylinder uses fixed elastomer bumpers instead of adjustable air cushions. It will not hold its load on air loss, so an external rod lock or pilot-operated check valve is required for fail-safe holding.
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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