Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-30SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-30SB 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 ACQJ20X70-30SB
The AirTAC ACQJ20X70-30SB is a double-acting JIS compact cylinder with an external extend stop, letting you fine-tune the forward end position directly on your equipment. It provides a usable forward travel range of 40 to 70 mm, shortening the 70 mm full stroke by up to 30 mm via an M8x1.25 adjuster screw, while the retract stroke remains completely unaffected.
Output force stays identical to a standard ACQ of this bore because the piston area is unchanged, delivering 157.1 N push at 0.5 MPa. This unit includes a male M8x1.25 rod end for direct mounting and a piston magnet for position sensing. It relies on fixed elastomer bumpers for end-of-stroke deceleration rather than adjustable air cushions.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-30SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-30SB |
|---|---|
| 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 ACQJ20X70-30SB
| 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 ACQJ20X70-30SB Is Used
Machining Fixture Clamping
Dial in the exact clamping depth on a CNC fixture without machining custom spacers, accommodating varying raw material thicknesses.
Packaging Diverter Stroke
Adjust the pusher extension length on a packaging line to handle different carton widths during rapid product changeovers.
Assembly Press Positioning
Set precise trial end positions for pressing small bearings on an automated assembly machine to prevent part damage.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-30SB the Right Cylinder?
When sizing this 20 mm bore actuator, stepping down to a 16 mm bore lowers the push force to 100.5 N at 0.5 MPa, whereas moving up to a 25 mm bore raises it to 245.4 N. If your application never requires altering the forward endpoint, a fixed-stroke ACQ cylinder will accomplish the same work. To order this adjustable variant correctly, confirm the 20 mm bore, 70 mm full stroke, 30 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 ACQJ20X70-30SB FAQ
It delivers a push force of 157.1 N and a pull force of 117.8 N at 0.5 MPa, with a push of 219.9 N at 0.7 MPa and a maximum push of 32 kgf at 1.0 MPa. The usable extend range is 40-70 mm, created by a 30 mm adjustment window on a 70 mm full stroke.
The external M8x1.25 threaded stop with a lock nut limits only the forward stroke length, meaning force remains identical to a standard ACQ since piston area is unchanged. The cylinder uses fixed elastomer bumpers for deceleration, and because it is a standard compact cylinder, it will not hold a load on air loss without an external rod lock.
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
Request a Quote for Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-30SB
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.