Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke250 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75B
The AirTAC ACQJ40X250-75B is a double-acting, single-rod JIS compact cylinder engineered as a long-stroke, made-to-order variant, exceeding the standard 100mm maximum for this bore size. It features an external threaded stop with a lock nut that limits the extend end position, providing a usable extend range of 175-250mm. The retract stroke remains completely unaffected by this adjustment. A male M14x1.5 rod end (-B) is included to couple directly to your load.
Because the internal piston area is unchanged, the output force remains identical to a standard ACQ of the same bore, delivering 628.3N push and 527.8N pull at 0.5MPa. The unit utilizes a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. Operating pressure spans 0.15-1.0MPa, and the body includes sensor grooves, though this specific configuration ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 250 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| 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 | M8×1.25 (F) / M14×1.5 (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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75B Is Used
Product Changeover Stops
Dial in the extend stroke from 175 to 250mm on the machine without disassembling tooling when switching between part families on a machining line.
Setup-Varying Diverter Arms
Fine-tune the actuation endpoint of a conveyor sorting gate by up to 75mm to accommodate varying package dimensions on the fly.
Trial End Positions
Establish precise pressing depth on a packaging folder by testing end positions during initial machine commissioning before locking the nut.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75B the Right Cylinder?
When sizing this 40mm bore, consider the neighbouring capacities: a 32mm bore yields 402.1N push at 0.5MPa, while a 50mm bore provides 981.8N. If your application requires the full 250mm extend stroke permanently without future position tweaks, a fixed-stroke ACQ cylinder would suffice. For setup-varying fixtures or product-changeover stops, this adjustable model is ideal. Confirm ordering essentials: 40mm bore, 250mm full stroke, 75mm adjuster window, male rod thread (-B), and note the lack of a magnet (-S) if sensors are required.
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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-75B FAQ
The usable extend range is 175-250mm (250mm full stroke minus the 75mm window). Force is identical to a standard ACQ: 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa. The retract stroke is unaffected.
An external M12x1.25 threaded stop with a lock nut limits the extend stroke length only; it does not alter piston area or force. The cylinder relies on a fixed NBR elastomer bumper for deceleration, not an adjustable air cushion. A plain ACQ-type does not hold its load on air loss, so an external rod lock or pilot-operated check valve is recommended 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 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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