Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-40SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 70mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke70 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 ACQJ20X70-40SB
The AirTAC ACQJ20X70-40SB is a double-acting JIS compact cylinder with an external extend stop, letting you fine-tune the stroke on the machine. With a 70mm full stroke and a 40mm adjustment window, the usable extend range is 30-70mm. The retract stroke remains completely unaffected. An M8x1.25 male rod thread couples directly to your load.
Because the piston area is unchanged, force output is identical to a standard ACQ of this bore. The 10mm rod operates at 30-500 mm/s with fixed elastomer bumpers at each end. The built-in piston magnet (-S) supports both reed and solid-state switches for position sensing.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-40SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 70 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 ACQJ20X70-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×70 | 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 ACQJ20X70-40SB Is Used
Machine Tending Setup
Dial in the exact extend stop during initial fixture alignment on a machining center without machining new spacers.
Product Changeover Stops
Quickly shift the extend endpoint from 70mm down to 30mm on a packaging line when handling different carton depths.
Assembly Press Trial
Test varying insertion depths on an electronics assembly fixture by turning the external M8x1.25 adjuster screw.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-40SB the Right Cylinder?
If 157.1N push at 0.5 MPa is excessive, dropping to a bore 12 yields 56.5N. If you need more power, a bore 25 provides 245.4N. Choose this adjustable model when trial end positions or product changeovers require frequent stroke tweaks; otherwise, a fixed-stroke ACQ suffices. Verify your ordering needs: 20mm bore, 70mm full stroke, 40mm window, S magnet, and 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 ACQJ20X70-40SB FAQ
Force is identical to a standard ACQ bore 20: 157.1N push and 117.8N pull at 0.5 MPa, 219.9N push at 0.7 MPa, and a maximum push of 32 kgf at 1.0 MPa. The usable extend range is 30-70mm (70mm full stroke minus the 40mm window).
An external M8x1.25 threaded stop with a lock nut limits how far the rod extends, shortening the stroke without changing piston area, so force is unchanged. Fixed elastomer bumpers decelerate the rod at both ends. The -S magnet works with reed or electronic 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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