Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-75SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-75SB 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 ACQJ20X70-75SB
The AirTAC ACQJ20X70-75SB 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 usable extend travel anywhere from 0 mm up to the full 70 mm stroke directly on the machine, while the retract stroke remains completely unaffected. Because the piston area stays constant, output force equals a standard ACQ of the same bore.
This 20 mm bore unit pushes 157.1 N and pulls 117.8 N at 0.5 MPa. It incorporates a fixed elastomer bumper at each end for end-of-stroke deceleration and includes a male M8x1.25 rod-end thread (-B) for direct load coupling. The integrated piston magnet (-S) supports both reed and electronic solid-state switches via the body grooves.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-75SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-75SB |
|---|---|
| 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 ACQJ20X70-75SB
| 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 ACQJ20X70-75SB Is Used
Machining Fixture Clamps
Dial in the exact clamping reach on a CNC mill fixture without machining new spacers, accommodating multiple raw part heights using the 0-70 mm travel window.
Product Changeover Stops
Adjust the extend endpoint rapidly on a packaging line when switching to a different carton size, relying on the external M8x1.25 adjuster screw to set the new position.
Assembly Press Trials
Find the precise insertion depth for pressing bearings during prototype runs, testing various positions safely before locking the nut down for production.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-75SB the Right Cylinder?
For lower force requirements, the 16 mm bore yields 100.5 N push at 0.5 MPa, whereas stepping up to a 25 mm bore provides 245.4 N push. If your extend endpoint never varies, a fixed-stroke ACQ cylinder is simpler and sufficient. When ordering this adjustable model, confirm the 20 mm bore, 70 mm full stroke, 75 mm window, the -S magnet, 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 ACQJ20X70-75SB 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 70 mm with a 75 mm adjustable window, giving a usable extend range of 0-70 mm. The retract stroke is unaffected.
The external M8x1.25 threaded stop with lock nut mechanically limits how far the rod extends, shortening the stroke length only. The force remains identical to a standard ACQ because the piston area is unchanged. Deceleration relies on a fixed elastomer bumper, not an adjustable air cushion.
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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