6701-2RS Sealed Deep Groove Ball Bearings 12x18x4 mm

Key Features

• Sealed on Both Sides — The 6701-2RS bearing is sealed on both sides to keep lubricant in.
• Chromium Steel Build — It is made from chromium steel (GCr15), built for durability and resistance under heavy loads.
• Low Friction Design — Its small friction and high-limit speed make it cost-effective, and it needs little maintenance.
• Pre-Lubricated Single Row — It is single-row and pre-lubricated, with normal accuracy.

Product Specifications

• Color: Blue
• Material: Bearing Steel
• Dimensions: 12x18x4 mm
• Piece count: 10
• Seal type: Sealed (RS/2RS)
• Part number: 6701-2RS
• Part numbers: 6701RS, ABEC-5

What It Is / How It Works

This is a blue deep groove ball bearing, a 12x18x4 mm rolling bearing with sealed 6701-2RS construction.

Deep groove ball bearings are among the most widely used rolling bearings and are common in small motors and hobby drivetrains.

Who It's For / Use Cases

Hobbyists who repair or upgrade small motorized models often need a bearing in this bore, outside diameter and width. Builders of compact rotary or micro motor setups also rely on deep groove bearings of this general kind when low friction and steady rotation matter.

How to Use / Care

1. Check that the bore, outside diameter and width match the 12x18x4 mm size before you install the bearing.
2. Keep the seals on both sides intact, since they hold lubricant in.

How to Choose

Start with size: the bore, outside diameter and width must match your shaft and housing, and this is a 12x18x4 mm bearing. Choose sealed (2RS) types when the bearing may meet dirt or liquid, since the rubber seals are oil and liquid resistant. Shielded (ZZ) types are the option for higher speed use, as they protect against dirt and debris.

Frequently Asked Questions

What size is this bearing?
It is 12 mm inside diameter, 18 mm outside diameter and 4 mm thick, written as 12x18x4 mm.

Is it sealed?
The 6701-2RS version is sealed on both sides with sheet steel reinforced nitrile rubber, and it is pre-lubricated.

What is it made of?
It is made from bearing steel, specifically chromium steel (GCr15), for durability and resistance under heavy loads.

How do sealed and shielded types differ?
Sealed (RS/2RS) types have rubber seals and a lower limit speed. Shielded (Z/ZZ) types run at high speed and protect from dirt and debris.