10Pcs MR115RS MR83RS Kit 20pcs 5*11*4 3*8*3 mm MR115-2RS Miniature Ball Bearings Blue Sealed MR83 2RS for RC Models/Motors

Overview

Two types of miniature deep groove ball bearings: MR83RS-BC (3×8×3mm) and MR115RS-BL (5×8×2.5mm), each with 10 pieces. They adopt a double-sided rubber sealing (RS) design, featuring excellent dust-proof and water-proof performance.

BL (Blue): MR115RS-BL
BC (Black): MR83RS-BC

The color distinction makes it easy to quickly identify the model, facilitating maintenance and assembly. Each bearing is pre-filled with high-quality lubricating grease before leaving the factory, ready for immediate use.

TECHNICAL SPECS

Model: MR115RS-BL

Inner (d): 5 mm
Outer (D):11 mm
Width (B): 4 mm
Grade: ABEC-3
Material:52100 Chrome Steel
Seal:2RS (double-sided rubber sealing) - Blue BL
Qty: 1 Lot = 10 Pcs

Model: MR83RS-BC

Inner (d): 3 mm
Outer (D): 8 mm
Width (B): 3 mm
Grade: ABEC-7
Material:52100 Chrome Steel
Seal:2RS (double-sided rubber sealing) - Black BC
Qty: 1 Lot = 10 Pcs

APPLICATION STRUCTURE

Q1: Why are the sealing rings of different colors?
A1: The color coding (BC black/BL blue) is used to facilitate quick identification of the model and avoid confusion.

Q2: What models are included in the 20-piece set?
A2: It includes 10 units of MR83RS-BC (3×8×3mm, black sealed) and 10 units of MR115RS-BL (5×8×2.5mm, blue sealed), totaling 20 units.

Q3: How can I confirm if this kit is suitable for my device?
A3: Please measure the diameter of the shaft of your device: if it is a 3mm shaft, use MR83RS; if it is a 5mm shaft, use MR115RS. At the same time, confirm whether the installation space can accommodate the outer diameter (8mm) and width of the bearing.

Q4: Do I need to add lubricating oil by myself?
A4: No. The bearings come pre-filled with high-quality lubricating oil when manufactured. Just install and use them directly.

Q5: Can it be used in motors?
A5: Absolutely. The MR83RS (with a 3mm shaft) and MR115RS (with a 5mm shaft) are common bearing models for miniature motors.