Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-10SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-10SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke40 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 ACQJ20X40-10SB
The AirTAC ACQJ20X40-10SB is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You can fine-tune the outward travel from 30 mm up to the full 40 mm directly on your machinery, while the retract stroke remains completely unaffected. Because the piston area stays the same, output force is identical to a standard ACQ of this bore.
This model includes a built-in piston magnet compatible with reed or electronic solid-state switches, plus a male M8x1.25 rod-end thread for direct load coupling. It uses an M5x0.8 port and relies on a fixed elastomer bumper at each end for end-of-stroke deceleration. Operating pressure spans 0.15-1.0 MPa, and the compact riveted body design saves valuable space.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-10SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-10SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 40 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 ACQJ20X40-10SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 ACQJ20X40-10SB Is Used
Machining Fixture Stops
Dial in the exact 30 to 40 mm extend position for varying part clamps on a CNC lathe without machining custom spacer plates.
Product Changeover Pins
Shift the outward stop on a packaging line conveyor to accommodate different carton widths rapidly during format changeovers.
Prototype Positioning
Test multiple extend end points on a labelling mechanism to find the optimal contact depth before finalizing the assembly design.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X40-10SB the Right Cylinder?
When sizing this 20 mm bore option, note it delivers 157.1 N push force at 0.5 MPa. Stepping down to a 16 mm bore reduces push to 100.5 N, whereas moving up to a 25 mm bore increases push to 245.4 N. If your application requires a fixed 40 mm extend length with no on-machine variation, a standard ACQ20X40 cylinder is sufficient. To order this adjustable unit correctly, confirm the 20 mm bore, 40 mm full stroke, 10 mm window, the -S magnet requirement, 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 ACQJ20X40-10SB 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 full stroke is 40 mm, and the external adjuster allows the usable extend range to be shortened to 30 mm.
No, the external M8x1.25 threaded stop changes only the extend travel distance, not the piston area, so force remains identical to a standard ACQ. The cylinder uses fixed elastomer bumpers for deceleration, and the -S magnet works with reed or 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
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