How does a hydraulic torque wrench work?

A hydraulic torque wrench uses pressurized hydraulic fluid to push a piston, which drives a ratchet mechanism through a lever arm. The output torque is T = P × A × r, where P is hydraulic pressure, A is piston area, and r is the effective arm length.

How do I convert bar pressure to torque?

T (N·m) = P (bar) × 0.1 (to MPa) × A (mm²) × r (mm) / 1000. The conversion factor 0.1 converts bar to MPa (N/mm²). The /1000 converts N·mm to N·m.

What is the accuracy of hydraulic torque wrenches?

Hydraulic torque wrenches typically achieve ±3% accuracy when properly calibrated, which is significantly better than manual torque wrenches (±10-25%). This makes them preferred for critical bolted joints.

What pressure range do hydraulic wrenches operate at?

Most hydraulic torque wrenches operate at 350–700 bar (5,000–10,000 psi). Low-profile (cassette) type wrenches typically use 700 bar maximum. Square drive types may operate at lower pressures with larger pistons.

When should I use a hydraulic wrench instead of a manual torque wrench?

Use hydraulic wrenches for: (1) bolts M24 and larger where manual torque is impractical, (2) critical joints requiring ±3% accuracy, (3) multiple bolts needing consistent torque, (4) confined spaces (low-profile type), (5) high-torque flange applications.

免費工程工具

液壓扳手扭矩計算器

將液壓壓力轉換為液壓扭矩扳手的輸出扭矩。輸入壓力、活塞面積和有效臂長。

T = P × A × rbar → N·m

結果

輸出扭矩

—

活塞力

—

壓力 (MPa)

—

扭矩 (ft·lbf)

—

由液壓壓力計算扭矩

其中 P 為單位 bar 的壓力（1 bar = 0.1 MPa = 0.1 N/mm²），A 為單位 cm² 的活塞面積（1 cm² = 100 mm²），r 為單位 mm 的有效臂長。η 為機械效率（通常為 93–97%）。

Categories:

Vibromera

專業便攜式轉子平衡機與振動分析儀製造商。提供全球運送與工程師支援。

R. Nova da Madorninha 152, 4460-376 Sra. da Hora, Portugal

增值稅（葡萄牙）： PT314539760

LUCID（德國）： DE4462352769937

商店

支撐

聯絡我們

+372 5836 4849

[email protected]

聯繫我們 →

支援語言：English · Deutsch · Русский · Español

付款方式：

VISA MC AMEX STRIPE PAYPAL BANK

透過 DHL · UPS · EMS 全球運送

Balanset-1A · €1975 Ask engineer

液壓扳手扭矩計算器 | 免費線上工具

結果

由液壓壓力計算扭矩

相關計算器

商店

支撐

聯絡我們