SV Technocrats India’s Tangent keys are a type of machine key used to transmit very high torque between a shaft and a hub, such as in flywheels or large gears. Unlike standard keys that are placed radially or axially, tangent keys are inserted tangentially to the shaft's circumference.

📐 Key Characteristics

• Orientation: Positioned tangentially to the shaft (along the circle, not across it).

• Installation: Always used in pairs, on opposite sides of the shaft, to balance forces and prevent eccentric loading.

• Shear Action: Transmit torque by shearing along their length.

• Keyway: Cut only in the hub (not on the shaft), reducing weakening of the shaft.

🧩 Design Details

• Typically rectangular or square in cross-section.

• Set at an angle to match the tangent at the point of contact.

• Can be driven in and out through access holes in the hub.

⚙️ Applications

Used in:

• Flywheels

• Crankshafts

• Large pulleys

• Heavy-duty rotating equipment Where high torque is required and axial movement is not.

✅ Advantages

• Transmits very high torque efficiently.

• No keyway on the shaft → preserves shaft strength.

• Less chance of shaft failure due to stress concentration.

❌ Disadvantages

• Complex to machine due to angular positioning.

• Requires precise alignment.

• Cannot handle axial forces — only rotational torque.

SV Technocrats India is leading supplier of all types of machinery keys in Pune