Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-30S
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-30S 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 ACQJ20X70-30S
The AirTAC ACQJ20X70-30S is a double-acting JIS compact cylinder with a 20 mm bore and a 70 mm full stroke. An external M8x1.25 threaded stop and lock nut limits the extend end position, providing a usable extend range of 40 to 70 mm. The retract stroke remains completely unaffected by this adjustment. Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore.
Operating pressure spans 0.15 to 1.0 MPa, with a fixed elastomer TPU bumper at each end for end-of-stroke deceleration. The -S suffix indicates a built-in piston magnet compatible with reed or electronic solid-state switches. The unit features a 10 mm rod and an M5x0.8 port, operating at speeds between 30 and 500 mm/s.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-30S Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-30S |
|---|---|
| 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 ACQJ20X70-30S
| 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 ACQJ20X70-30S Is Used
Machining Fixture Stops
Dial in the exact extend position from 40 to 70 mm when clamping raw castings of varying lengths on a CNC lathe.
Carton Forming Changeover
Quickly alter the extend endpoint to accommodate different carton sizes on a packaging line without swapping hardware.
Prototype Press Testing
Set trial end positions precisely during product development to verify pressing depth before finalizing a machine design.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-30S the Right Cylinder?
When sizing this unit, consider the 20 mm bore offering 157.1 N push and 117.8 N pull at 0.5 MPa. If your application requires less force, the 16 mm bore provides 100.5 N push, while the 25 mm bore yields 245.4 N push for higher load demands. A fixed-stroke ACQ is sufficient if your end position never varies, but the ACQJ is essential for on-machine tuning without replacing parts. Confirm your ordering essentials: 20 mm bore, 70 mm full stroke, 30 mm window, -S magnet, and the default female 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 ACQJ20X70-30S 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 30 mm window, allowing an adjustable extend range of 40 to 70 mm.
The external M8x1.25 threaded stop limits the extend stroke length only, meaning the force remains identical to a standard ACQ. Deceleration is handled by fixed elastomer TPU bumpers, not an adjustable air cushion, so add an external shock absorber for high-energy loads.
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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