Timken Cylindrical Roller Bearings 铁姆肯CRB设计特性 Design Characteristics铁姆肯 设计特性
Four-row bearings with extremely high radial capacity for heavy-duty roll neck applications in metal rolling mills
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Cylindrical Roller Bearing Product Overview
Cage Design 保持架设计
E = glass fiber reinforced nylon 玻璃纤维增强型尼龙 M = one piece, machined bronze finger or fully milled一
子轴承标准：基于9千万转(例如：3千小时/500转/分)的基本额定寿命 – Used since loads equal to C1 could cause plastic deformation within a bearing 采用相当于C1的载荷能够导致轴承的塑性变形
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售，也可仅出售部件
Not currently a standard Catalog offering. Available in same size range as single row product.目前没有样本提供，与单列CRB尺寸相
同的可以提供
NN
Current designs use NN, NNU nomenclature, some older designs exist as RA (NNU) and RD(NN) 目前设计采用
P6尺寸公差和P5标准行位公差
4 styles 4种类型: RY, RYK, RX, RXK Typically case hardened rings and rollers 一般为渗碳 淬火内外圈和滚子 CC bronze drilled finger (RY) or steel pin-type cages (RX) standard 铜质钻孔指型保持架(RY)或钢质销式保 持架(RX)
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Cylindrical Roller Bearing Product Overview
Single Row CRB - Basic Designs
单列CRB-基本类型 基本类型 单列
RIU, RU (NU) Outer ring has two integral ribs 外圈有两个挡边 Inner ring has a cylindrical OD 内圈外表面为 without ribs 圆柱形，无挡边 圆柱形， Supports heavy radial load 承受径向重载 Accommodates axial expansion or contraction 调节轴向膨胀或收缩 Axial displacement between rings with minimum friction while rotating 运转时内外圈间的轴向位移产生最小的摩擦 RIN, RN (N) Inner ring has two integral ribs 内圈有两个挡边 Outer ring has a cylindrical bore 外圈直孔，无 外圈直孔， without ribs 挡边
Roller Profile - LRU, MLRU滚子轮廓 LRU, MLRU 滚子轮廓Balanced stress distribution平衡的应力分布
– Standard design 标准设计 – Or application specific 或应用细节
• LRUS, MRUS
Similar to Timken MRD profiles 与铁姆肯MRD轮廓类似 与铁姆肯 轮廓类似 Advertised by SKF
理论上达到一百万转的基本额定寿命时的固定不变得径向载荷 – Moving forward, this will be the Timken standard for CRB’s 这在以后会成为Timken圆柱轴承的标准
C90: Timken standard (TRBs): Based on basic rating life of 90e6 revolutions (i.e., 3000 hours/500 rpm) 铁姆肯圆锥滚
Stress concentrations where radii begin 在弧形起始处有应力集中
– The potential exists 潜在可能 – In most instances the rollers are tumbled ？
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Cylindrical Roller Bearing Product Overview
Low friction, high speed capability (under pure radial load)
纯径向载荷条件下，低摩擦， 纯径向载荷条件下，低摩擦，高速运转
Extensive float capability
加强浮动能力
Separable design - flexibility at installation 分体设计- 安装灵活 分体设计
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Cylindrical Roller Bearing Product Overview
Capacity Ratings 负载能力 Sources来源:
– International Organization for Standardization (ISO) 国际标准化组织 – American Bearing Manufacturer’s Association (ABMA) 美国轴承制造商协会 – Company specific - e.g., “Torrington capacity” 公司标准—例如：“托灵顿负载能力标准”
Core Orientation
Timken Cylindrical Roller Bearing Product Overview 铁姆肯圆柱滚子轴承产品 概览
Timken Technical & Commercial Training
Cylindrical Roller Bearing Product Overview
(0.4 - 63 inches)
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Cylindrical Roller Bearing Product Overview
Advantages of CRBs CRBs的优点 的优点
Maximum radial load capability最
大径向承载能力
P (radial load)
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Cylindrical Roller Bearing Product Overview
Double Row CRBs 双列CRBs 双列
Designed to ISO / DIN specified interchangeable dimensions where available 设计为可与ISO/DIN尺寸系列互换 Sold as complete assembly, ring roller cage assembly, or separable ring可整体出
和锥孔两种类型 外圈可互换
Inner races interchangeable with outer assemblies 内 Standard size: 160 mm - 1200 mm bore
标准尺寸：160 mm - 1200 mm 内径 更大的达84英寸的也可提供
Larger sizes to 84 inch OD available P6 boundary tolerances and P5 runouts standard采用
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Cylindrical Roller Bearing Product Overview
Roller Profile - LJ, LJG 滚子轮廓 LJ, LJG 滚子轮廓Non-tangent radius非 相切半径 EDGE stress concentration 边界应力集中 (zero crown)
– The thrust load is supported by the flange or thrust collar 轴向载荷由挡边或推力卡环支承
• As a rule of thumb the axial load can not exceed 10% the radial load 拇指法则：轴向载荷不能超过径向载荷的10%
四列轴承有极高的径向承载能力， 四列轴承有极高的径向承载能力，用于冶金行业的重载轧机辊颈 Special options 特殊选项 – Advanced metallurgy 高级冶金技术 – Enhanced lubrication features 增强型润滑特性 – Superprecision variations for process control 超精变量用于加工过程控制 – Custom designs for specific applications 特殊应用按客户要求进行设计 Size range尺寸范围: 10mm - 1600mm bore(内径)
Flat roller ends
Flat profile (no hollow)
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Roller Profile - LJG, LR, MLR 滚子轮廓 LJG, LR,MLR 滚子轮廓-