Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-40SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 100mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke100 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 ACQJ20X100-40SB
The ACQJ20X100-40SB 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 stroke anywhere from 60 mm up to the full 100 mm directly on your machine without swapping parts. The retract movement remains completely unaffected by this adjustment.
Because the adjuster only alters travel length and not piston area, the generated force is identical to a standard ACQ bore 20. You get 157.1 N push and 117.8 N pull at 0.5 MPa. This variant includes a built-in piston magnet for positioning feedback and a male M8x1.25 rod end coupling directly to your load.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-40SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 100 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 ACQJ20X100-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×100 | 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 ACQJ20X100-40SB Is Used
CNC Fixture Tuning
Dial in the exact clamping reach on CNC milling fixtures during prototype runs or when swapping raw material thicknesses without machining new stops.
Carton Changeover
Adjust the extend end position on packaging lines to accommodate different box sizes or sealing flap heights rapidly between production batches.
Lab Test Positioning
Set precise contact depth for material testing presses, allowing researchers to vary the compression distance against a sample without reconfiguring the rig.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-40SB the Right Cylinder?
If you need less push force, the bore 12 model provides 56.5 N at 0.5 MPa, while stepping up to bore 25 yields 245.4 N. Choose this 20 mm bore if your application requires 157.1 N push force and on-the-fly extend-end tuning. If the end position never varies, a fixed-stroke ACQ cylinder suffices. To order, confirm the 20 mm bore, 100 mm full stroke, 40 mm adjustable 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 ACQJ20X100-40SB 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 100 mm with a 40 mm window, giving a usable extend range of 60-100 mm. The piston rod is 10 mm, the port is M5x0.8, the male rod thread is M8x1.25, and the external adjuster thread is M8x1.25.
No, the external stop only shortens the extend travel; the force remains identical to a standard ACQ because the piston area is unchanged. Deceleration is handled by a fixed elastomer bumper at each end, not an adjustable air cushion. For high-speed or high-energy loads, add an external shock absorber. Also, note this cylinder does not hold its load on air loss; use an external rod lock for fail-safe holding.
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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.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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