Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-40SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke75 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-40SB
The ACQJ125X75-40SB is a double-acting, single-rod JIS compact cylinder built for big-bore pneumatic tasks up to 300 mm standard stroke. It includes a male piston rod thread (M30x1.5) for direct load coupling and a PT3/8 port. Because it carries an -S magnet, its integrated sensor grooves readily accept reed or solid-state switches for position detection.
This variant features a 40 mm adjustable window, meaning you can fine-tune the extend end position on the machine across a 35 to 75 mm usable range via the external M27x2.0 threaded stop and lock nut. The retract stroke remains completely unaffected. Modifying the end stop alters only the travel length; the piston area stays the same, so force output remains identical to a standard ACQ of this bore, yielding 6135.9 N push and 5733.8 N pull at 0.5 MPa.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-40SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 75 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 ACQJ125X75-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 ACQJ125X75-40SB Is Used
Press Tooling Changeovers
Dial in the exact 35 to 75 mm extend position during metal-stamping fixture swaps without machining new spacer plates or changing the cylinder.
Heavy Assembly Line Stops
Modify large-product end-of-line stops on the fly to accommodate varying pallet lengths, utilizing the full 1251 kgf maximum thrust for heavy pushing.
Palletizing Trial Positions
Test and tweak the extend endpoint for different carton sizes on a packaging line, relying on the fixed NBR bumper to absorb end-of-stroke energy.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-40SB the Right Cylinder?
When sizing this unit, dropping to the 100 mm bore lowers the 0.5 MPa push force to 3927.0 N, while stepping up to the 160 mm bore raises it to 10053.1 N. If your application never requires altering the extend endpoint, a fixed-stroke ACQ cylinder provides the same thrust in a simpler layout. To order this adjustable version correctly, confirm the 125 mm bore, 75 mm full stroke, 40 mm window, -S magnet, and -B male rod end.
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 ACQJ125X75-40SB FAQ
It delivers 6135.9 N push and 5733.8 N pull at 0.5 MPa, 8590.3 N push at 0.7 MPa, and a maximum push of 1251 kgf at 1.0 MPa. The 75 mm full stroke has a 40 mm adjustable window, providing a usable extend range of 35 to 75 mm, while the retract stroke remains fixed.
An external M27x2.0 threaded stop with a lock nut limits the extend travel, allowing on-machine endpoint tuning without changing parts. The adjustment changes stroke length only, so force stays identical to a standard ACQ. Deceleration is handled by a fixed elastomer bumper at each end, not an adjustable air cushion.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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