Round nut w/pin holes (DIN 1816)

Question 1: What is a DIN 1816 lock nut?

Answer: A DIN 1816 lock nut, also known as a Shaft Nut or Slotted Round Nut, is a heavy-duty, round nut designed to secure bearings and other components on a shaft. Its distinguishing features are external slotted lobes and internal set pin holes. These nuts are much more robust than standard conduit lock nuts and are specifically engineered for high-load applications. The slotted lobes facilitate tightening and may incorporate a locking function, while the pin holes allow the nut to be turned using a special tool called a pin spanner.

Question 2: What is DIN 1816 applied in?

Answer: DIN 1816 shaft nuts are primarily used to axially locate and secure components on shafts with metric threads. Their main applications are summarized in the table below:

Question 3: What are the materials for DIN 1816?

Answer: The materials for DIN 1816 lock nuts are as follows:

• Standard Material: High-quality 45# carbon steel, with a black oxide and oil immersion surface treatment.

• Customizable Materials: Available upon request, including alloy steels such as 42CrMo and 40Cr, as well as various grades of stainless steel.

• Customizable Surface Finishes: Can be specified based on the operating environment, including zinc plating, nickel plating, and phosphating.

Question 4: How to install DIN 1816 lock nuts?

Answer: The installation procedure for DIN 1816 lock nuts is straightforward:

1. Tool Selection: Use the appropriate tool—a pin spanner (also called a pin wrench) that fits into the nut's external pin holes, or a standard hook wrench that engages the slotted lobes.

2. Tightening: Thread the nut onto the shaft and tighten it to the specified torque. The required torque depends on the necessary preload for the application.

3. Locking Feature (if applicable): If the nut model includes lock screws, follow this procedure:

   • Step 1: Using a hex key, gently tighten each lock screw in sequence until initial resistance is felt.

   • Step 2: Tighten all screws again in sequence to the final specified torque as detailed in the product catalog.

Question 5: How to remove DIN 1816 lock nuts?

Answer: The removal method depends on the specific nut type:

• For nuts secured only with lock screws: Simply loosen and remove the lock screws to detach the nut.

• For nuts equipped with separate locking pins (a common feature referenced for shaft nuts):

  1. Loosen any lock screws first.

  2. Important: The dedicated locking pins may remain engaged with the shaft threads even after screws are loosened.

  3. Gently tap the nut near the locking pin area with a rubber hammer to release the pins' grip.

  4. Once the pins are disengaged, use a pin spanner or hook wrench to unscrew the nut from the shaft.

  • Note: Locking pins are often made of durable materials like phosphor bronze, which resists deformation, allowing the nut to be safely reused after proper removal.

Download DIN 1816 Dimensions pdf and  DIN 1816 Weight Chart  or views online

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