Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke125 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20SB
The ACQJ125X125-20SB is a double-acting JIS compact cylinder featuring an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend range from 105 mm up to the full 125 mm directly on your machinery, while the retract stroke remains completely unaffected. As a big-bore variant, it handles heavy-duty tasks within a space-saving riveted body design.
Because the internal piston area is unchanged, the output force is identical to a standard ACQ of this bore, yielding 6135.9 N of push force at 0.5 MPa. This unit includes the male M30x1.5 rod-end thread for direct load coupling, a piston magnet for position sensing, and fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 125 mm |
| Adjuster thread | M27×2.0 |
| Port size | PT3/8 |
| 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 | M22×2.5 (F) / M30×1.5 (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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20SB Is Used
Heavy Press Tonnage Setup
Dial in the exact 105-125 mm extend position during heavy press changeovers without machining new stop collars.
Large Assembly Fixture Tuning
Adapt end-of-stroke positions on the fly for large automotive sub-assembly fixtures handling varying product dimensions.
Palletizer End-Stop Trials
Test and set precise final end positions for large palletizing arms before locking down the external stop nut.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20SB the Right Cylinder?
When sizing this big-bore unit, stepping down to a 100 mm bore drops the 0.5 MPa push force to 3927.0 N, whereas stepping up to a 140 mm bore increases it to 7696.9 N. If your application requires a fixed extend length and never needs on-the-fly adjustments, a standard ACQ cylinder will suffice. To order this adjustable model correctly, confirm the 125 mm bore, 125 mm full stroke, 20 mm window, the S magnet option, 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-20SB FAQ
The usable extend range is 105-125 mm (a 20 mm window off the 125 mm full stroke). Force is identical to a standard ACQ: push is 6135.9 N and pull is 5733.8 N at 0.5 MPa, push is 8590.3 N at 0.7 MPa, and maximum push is 1251 kgf at 1.0 MPa.
An external M27x2.0 threaded stop with a lock nut limits the extend stroke only; retract is unaffected and force stays the same. The cylinder uses fixed NBR elastomer bumpers, not adjustable air cushions. The built-in -S magnet works with both reed and solid-state electronic switches.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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