BEARING TABLES. Needle Roller Bearings. Needle roller and cage assemblies B Needle roller and cage assemblies for connecting rod bearings

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Marybeth Lane
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1 B Needle roller and cage assemblies for connecting rod bearings B Drawn cup needle roller bearings B Needle Roller Bearings BEARING TABLES Machined-ring needle roller bearings Machined-ring needle roller bearings, separable B B Inner rings B Clearance-adjustable needle roller bearings B Complex bearings B Roller followers B Cam followers B Thrust roller bearings B Components Needle rollers / Snap rings / Seals B Linear bearings B One-way clutches B Bottom roller bearings for textile machinery Tension pulleys for textile machinery B

2 B-2

3 Needle Roller and Cage Assemblies

4 Needle Roller and Cage Assemblies This needle roller and cage assembly is one of the basic components for the needle roller bearing of a construction wherein the needle rollers are fitted with a cage so as not to separate from each other. The use of this roller and cage assembly enables to design a compact and lightweight construction by utilizing a shaft or a housing as the direct raceway surface, without using inner ring and outer ring. The needle rollers are guided by the cage more precisely than the full complement roller type, hence enabling high speed running of bearing. In addition, its rigidity and load capacity are high for the specific space. Type of needle roller and cage assembly Cage type Applied shaft diameter (mm) Composition of nominal bearing number Nominal bearing number Code items and respective dimensions K K S K T2 Machined ring type Polyamide resin type Welded type K S Tail code Width Roller set outer diameter Inscribed circle diameter Type code K S Inscribed circle diameter : 20 Roller set outer diameter : 24 Width : 10 S : Welded type KMJ KMJ S PCJ Punched type Welded type KMJ Width Roller set outer diameter Inscribed circle diameter Type code KMJ Inscribed circle diameter : 20 Roller set outer diameter : 26 Width : 13 KJ S Welded type KJ S Tail code Width Roller set outer diameter Inscribed circle diameter Type code KJ S Inscribed circle diameter : 30 Roller set outer diameter : 35 Width : 17 S : Welded type KV S Welded type KV S Tail code Width Roller set outer diameter Inscribed circle diameter Type code KV S Inscribed circle diameter : 30 Roller set outer diameter : 35 Width : 17 S : Welded type K ZW Machined ring type K ZW Tail code Width Roller set outer diameter Inscribed circle diameter Type code K ZW Inscribed circle diameter : 20 Roller set outer diameter : 24 Width : 45 ZW : Double-row type GK Machined ring type Split type GK Width Roller set outer diameter Inscribed circle diameter Type code GK Inscribed circle diameter : 30 Roller set outer diameter : 35 Width : 17 The ones with tail code T2 using polyamide resin cage shall be used at allowable temperature 120 C and, under continuous running, at 100 C or less. The applied shaft diameter of welded type are described based on size that manufacturers can deal with a manufacturing. Therefore, it has nothing to do with the Demention Table. B-4

5 Inter-roller diameter deviation of needle rollers Inter-roller diameter deviation of needle rollers which are built in one cage is within 2um. The respective specified diameter tolerances for built-in needle rollers are identified by identification colors on the package label, as shown in Table 1. The standard identification colors marked on each label are red, dark blue, blue, black and white, unless otherwise specially indicated. Where two or more bearings are used in tandem, those of same identification color must be used for equal distribution of bearing load. Table 1 Color identification of diameter tolerances for needle roller bearings Identification color on label Diameter tolerance m Classification Shaft and housing specifications Where a shaft and a housing are used as the direct raceway surface, the raceway surface must meet the specifications described in Table 3. Table 3 Shaft and housing specifications Characteristics Roundness (max) Cylindricality (max) Surface roughness (max) Surface hardness Depth of hardened layer (min) Shaft Housing IT3 IT4 IT3 IT4 Refer to Table 7.4 on page A-39. HRC58 64 Refer to formula (7.1) on page A-39 Red Dark blue Blue Black White Gray Green Brown Yellow Standard Semi-standard Bearing installation related dimensions The tolerances for the nominal dimension "Bc" of cage specified in Table 4 are recommended as the guide width b of cage. Table 4 Guide width tolerances Unit : mm Tolerances for guide width b Classification Single row Double row Metric system Bc 0 Bc 0.1 Radial Clearance Inch system Bc 0.4 Bc 0.5 When a shaft and a housing are used as the direct raceway surface, the radial clearance is determined by the shaft diameter and the housing hole dimension. Where the diameter tolerances for needle rollers are standard (tolerances color-identified in red, dark blue, blue, black, white), the shaft diameters and housing hole dimensions shown in Table 2 are used. b Bc Table 2 Recommended fits Shaft diameter mm Smaller than ordinary clearance Radial Ordinary clearance clearance Larger than ordinary clearance 80 j5/g6 h5/g6 g6/g h5/g6 g5/g6 f6/g6 140 h5/g6 f5/h6 f6/g6 Shaft guide b Bc Housing guide Fig. 1 B-5

6 T2 S ZW MJ T2 S ZW 3 12mm K3 6 7T K4 7 7T K5 8 8T K5 8 10T K6 9 8T K6 9 10T K T K7 10 8T K T K8 11 8T K T K K T K K K T K T K T K K K K K K K K S K K ZW K B-6

7 MJ 12 16mm K K K K K K K K S K K ZW K K K K K S K S K K ZW K K KMJ K K K K K S K KMJ KMJ K B-7

8 S ZW MJ MJ S S ZW 16 20mm K K S K S K K K K K K K K S K K KMJ S K K K K K K S K K S K S K ZW K ZW K KMJ KMJ S KMJ S K B-8

9 MJ MJ S 21 25mm K K K S K S K K S K K ZW K KMJ K K K S K K K K K ZW K K K S K K S K S K ZW K ZW K K K K B-9

10 S ZW MJ MJ S J S S ZW 25 32mm KMJ KMJ S K K K K K K K S K ZW K K K K K K S K K S K S KJ S K S K ZW K S KMJ K K KMJ K ZW K K S B-10

11 MJ MJ S J S 32 38mm K K S K ZW KJ S KMJ KJ S K K K KJ S K K K ZW KJ S K ZW K K K ZW K K K K K ZW K ZW K KJ S KJ S K K K B-11

12 ZW MJ J S ZW 38 48mm KMJ K K K K K K K K K K K K K K K K K K KJ S K K K K K KJ S K K K ZW B-12

13 MJ J S V S 48 60mm K K K K K K K K K K K KV S K K K K K K K K K K K K K K K K K K B-13

14 ZW MJ ZW 60 80mm K ZW K K K K K K K K K K K ZW K K K K K K K KMJ K KMJ K K K K K K B-14

15 MJ V S mm K K K KMJ K K K K K K K K K K K K KV S K K K K K K K K K K K K B-15

16 Bc mm K K K K K K K K K K K K K K K K K K K K K K K K K B-16

17 285mm K B-17

18 Inch System Type PCJ mm Boundary dimensions Basic load ratings Limiting speeds Bearing Mass numbers Fw Ew Bc Cr Cor Cr Cor (approx.) (!/2) (%/8) 12.70(!/2) PCJ (#/4) (1) 25.40(1) PCJ (&/8) (1!/8) 25.40(1) PCJ (1) (1!/8) (1%/16) 19.05(#/4) PCJ (1%/16) 25.40(1) PCJ (1!/2) 25.40(1) PCJ (1!/2) 31.75(1!/4) PCJ (1%/8) 19.05(#/4) PCJ (1!/4) (1%/8) 25.40(1) PCJ (1%/8) 38.10(1!/2) PCJ (1#/8) (1#/4) 31.75(1!/4) PCJ (1&/8) 25.40(1) PCJ (1!/2) (1&/8) 31.75(1!/4) PCJ (1&/8) 38.10(1!/2) PCJ (2!/8) 25.40(1) PCJ (1#/4) (2!/8) 31.75(1!/4) PCJ (2!/8) 38.10(1!/2) PCJ (2#/8) 25.40(1) PCJ (2) (2#/8) 31.75(1!/4) PCJ (2#/8) 38.10(1!/2) PCJ (2!/16) (2&/16) 25.40(1) PCJ (2!/8) (2!/2) 25.40(1) PCJ (2!/2) 38.10(1!/2) PCJ (2!/4) (2%/8) 25.40(1) PCJ (2#/8) (2#/4) 38.10(1!/2) PCJ (2!/2) (2&/8) 25.40(1) PCJ B-18

19 Cage and roller type needle roller bearings mm Boundary dimensions Basic load ratings Limiting speeds Bearing Mass numbers Fw Ew Bc Cr Cor Cr Cor (approx.) (2!/2) (2&/8) 38.10(1!/2) PCJ (2#/4) (3!/8) 25.40(1) PCJ (3) (3#/8) 25.40(1) PCJ (3#/8) 38.10(1!/2) PCJ (3&/8) 25.40(1) PCJ (3!/2) (4) 25.40(1) PCJ (4) 38.10(1!/2) PCJ (4) (4!/2) 25.40(1) PCJ (4!/2) 38.10(1!/2) PCJ B-19

SECTIONAL OVERHEAD DOORS

SECTIONAL OVERHEAD DOORS Why choose Insulated Sectional Overhead Doors? 25mm approx. 40mm This leaflet is offered as a guide for the Trade when presenting the arguments in favour of specification and selection