Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke40 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40SB
The AirTAC ACQJ125X40-40SB is a double-acting, big-bore compact cylinder with an external threaded stop and lock nut that limits the EXTEND end position. You can fine-tune the usable extend range from 0 up to 40 mm directly on your machinery without swapping parts. The RETRACT stroke remains completely unaffected by this adjustment.
Because the piston area stays the same, output force is identical to a standard ACQ of this bore, delivering 6135.9 N push at 0.5 MPa. This variant includes a male M30x1.5 piston rod end for direct load coupling, a built-in piston magnet for electronic or reed switches, and fixed NBR elastomer bumpers at each end. The external adjuster utilizes an M27x2.0 thread.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 40 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 ACQJ125X40-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×40 | 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 ACQJ125X40-40SB Is Used
Press Tonnage Setup
Dial in the exact extend stop from 0 to 40 mm during heavy-press changeovers to accommodate varying material thicknesses without machining new spacers.
Large Fixture Clamping
Adjust the end position on the fly for oversized automotive or structural welding fixtures that require precise clamping depth modifications.
Pallet Positioning
Fine-tune the extend endpoint on large palletizing equipment to handle different pallet heights or product dimensions quickly on the factory floor.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40SB the Right Cylinder?
When sizing this big-bore compact unit, consider the adjacent bore options: dropping down to an ACQJ100 yields 3927.0 N push, while stepping up to an ACQJ140 provides 7696.9 N at 0.5 MPa. If your application requires a fixed 40 mm extend depth without on-machine variation, a standard ACQ cylinder will suffice. To order, confirm the 125 mm bore, 40 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40SB 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 full stroke is 40 mm, and the adjustable window allows a usable extend range of 0 to 40 mm.
No, the external M27x2.0 threaded stop changes only the extend length, not the piston area, so force remains identical to a standard ACQ. Deceleration is handled by fixed NBR elastomer bumpers at each end, not adjustable air cushions. Note that a plain ACQ-type cylinder will not hold its load on air loss; for a fail-safe hold, use an external rod lock or pilot-operated check valve.
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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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