---
product_id: 21920079
title: "Koyo B-138 Needle Roller Bearing, Full Complement Drawn Cup, Open, Inch, 13/16\" ID, 1-1/16\" OD, 1/2\" Width, 5200rpm Maximum Rotational Speed"
brand: "koyo"
price: "R$471"
currency: BRL
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.br/products/21920079-koyo-b-138-needle-roller-bearing-full-complement-drawn-cup
store_origin: BR
region: Brazil
---

# 1/2" slim width for tight spaces 5200rpm max speed, heat-tolerant 13/16" ID precision fit Koyo B-138 Needle Roller Bearing, Full Complement Drawn Cup, Open, Inch, 13/16" ID, 1-1/16" OD, 1/2" Width, 5200rpm Maximum Rotational Speed

**Brand:** koyo
**Price:** R$471
**Availability:** ✅ In Stock

## Summary

> ⚙️ Power your precision with endurance and speed!

## Quick Answers

- **What is this?** Koyo B-138 Needle Roller Bearing, Full Complement Drawn Cup, Open, Inch, 13/16" ID, 1-1/16" OD, 1/2" Width, 5200rpm Maximum Rotational Speed by koyo
- **How much does it cost?** R$471 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/21920079-koyo-b-138-needle-roller-bearing-full-complement-drawn-cup)

## Best For

- koyo enthusiasts

## Why This Product

- Trusted koyo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Certified Quality:** Meets ASTM F2162 standards for trusted, consistent bearing excellence
- • **Space-Savvy Design:** Slim 1/2" width and drawn cup outer shell fit seamlessly into compact assemblies
- • **Durability Engineered:** Through-hardened high-carbon chromium steel rollers resist wear and heat under heavy loads
- • **Precision Performance:** Exact 13/16" ID and 1-1/16" OD ensure reliable, smooth rotation up to 5200rpm
- • **Maximized Load Capacity:** Full complement rollers deliver superior radial strength for demanding applications

## Overview

The Koyo B-138 Needle Roller Bearing features a full complement of through-hardened high-carbon chromium steel rollers housed in a drawn cup outer shell. Designed for high dynamic loads and tight spaces, it offers a 13/16" inner diameter, 1-1/16" outer diameter, and a slim 1/2" width. Rated for speeds up to 5200rpm and meeting ASTM F2162 quality standards, it ensures durable, high-performance operation in demanding industrial applications.

## Description

Koyo B-138 Needle Roller Bearing, Full Complement Drawn Cup, Open, Inch, 13/16" ID, 1-1/16" OD, 1/2" Width, 5200rpm Maximum Rotational Speed

## Features

- Drawn cup needle roller bearing for applications with high dynamic loads
- Drawn steel outer shell (cup) has a reduced cross-section for use in restricted spaces
- Full complement of rollers for higher radial load capacity than caged rollers
- Through-hardened, high-carbon chromium steel rollers for heat tolerance and durability under heavy loads
- Meets standard ASTM F2162 for quality assurance

## Product Details

- **Brand:** Koyo
- **Material:** Cageless
- **Item dimensions L x W x H:** 0.81 x 0.5 x 1.06 inches
- **Item Weight:** 0.04 Pounds
- **Bearing Number:** B-138

## Images

![Koyo B-138 Needle Roller Bearing, Full Complement Drawn Cup, Open, Inch, 13/16" ID, 1-1/16" OD, 1/2" Width, 5200rpm Maximum Rotational Speed - Image 1](https://m.media-amazon.com/images/I/71C+l35nDZL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works
*by A***E on January 14, 2025*

You know what's up. It just works.

### ⭐⭐⭐⭐⭐ Bearings are important
*by C***G on July 31, 2021*

If you have bad bearings replace immediately

### ⭐⭐⭐⭐⭐ Fits Harley EVO
*by S***C on October 19, 2020*

Twice as many needles as the stock Harley INA bearing.

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**Shop now:** [https://www.desertcart.com.br/products/21920079-koyo-b-138-needle-roller-bearing-full-complement-drawn-cup](https://www.desertcart.com.br/products/21920079-koyo-b-138-needle-roller-bearing-full-complement-drawn-cup)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-24*