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CAT-57163 Cam FollowersCam Followers June 2008 Overseas Dept. PATENT PENDING CAT-57163 Cam FollowersCam Followers June 2008 Overseas Dept. PATENT PENDING 21 3 Way Hex Head Cam Followers Lubrica tion loo t can be chosen from th ree dir ections . It allow s flexib le desig ning an d maint enance . Lubrica tion loo t can be chosen from th ree dir ections . It allow s flexib le desig ning an d maint enance . Easy mounti ngEa sy mounti ng Standard Type Cam Follower CF···(F)(V)B(UU R) 3~30 mm 5mm to 30mm of stud dia. are available for widely use. Stud dia. Outer Ring Seal Retainer Side Plate Stud Needle Roller Solid Eccentric Stud Type Cam Follower CFES···B(UU R) 6~18 mm The stud is designed eccentric to the center axis of the outer ring. This allows easy adjustment of outer ring position in the radial direction in relation to the mating track surface by turning the stud, which makes load distribution on multiple numbers of Cam Followers uniformed. Mount- ing dimensions are the same as those of standard Cam Followers with eccentricity of 0.25 to 0.6 mm. Stud dia. Eccentric Stud E cc en tr ic ity ε Standard Type Cam Follower CFE···(V)B(UU R) 6~30 mm An eccentric collar is assembled over the Cam Follower stud, enabling the outer ring to be positioned easily in the radial direction against the mating track surface. Eccentric- ity is 0.4 to 1.5mm. Stud dia. Eccentric Collar E cc en tr ic ity ε C-Lube Cam Follower CF···WBUU R/SG 6~20 mm Easy Mounting Type Cam Follower CF-SFU···B 6~20 mm Heavy Duty Type Cam Follower NUCF···BR 10~30 mm C-Lube Cam Followers are bearings with prepacked thermosetting solid lubricant (C-Lube) inside. As the bearing rotates, the lubricating oil is deposited onto the raceway in the correct colume maintaining the lubrication performance for greatly extended periods of time. This Cam Follower has stepped tapered portion on the stud that makes easy fixing by tightening a set screw to the stepped portion. This Cam Follower is suite to pallet changer where a large number of Cam Followers are used. This is a full complement type Cam Follower incorporating double rows of cylindrical rollers to support large radial load and some axial load. Stud dia.Stud dia.Stud dia. Cylindrical Roller Thrust Disk Type Cam Follower CF···(F)WB(UU R) 3~20 mmStud dia. Special resin thrust washers are placed to reduce friction and wear due to unexpected axial load caused by misalign- ment, etc. Thrust Washer Thrust Washer Lubrication from three ways Stud dia. 12 to 30mm 1 Way Lubrication from one way Stud dia. 5 to 10mm Stud Outer Ring Hex Socket Side Plate Needle Roller Grease Nipple Cam Followers are follower bearings for cam mecha- nisms and linear motions provided with high rigidity and high accuracy. They are, therefore, used widely for machine tools, industrial robots, electronics devices, and OA equipment. Hex Head Cam Followers can be fixed firmly by hex- agonal wrench and re-lubrication root can be chosen from three positions. This series contributes easy assembling and easy maintenance in your applications. C-Lube Unit for Cam Followers C-Lube Unit CL is the lubrication-supporting equipment for the track surface of Cam Follower's outer ring. Full maintenance free for both inside and the outside of Cam Follower is possible when CL unit is assembled to C-Lube Cam Follower CF···/SG. Needle Roller C-Lube (Solid Lubrication) C-Lube (Solid Lubrication) C-Lube Cam Follower CF···/SG C-Lube Unit for Cam Follower CL Solid lubrication provides long time operation free from re-lubrication. Full Maintenance Free Hex Head Cam Followers 43 Hex Head Cam Followers include the caged type and the full complement type. Caged type has a small coefficient of friction and is suitable for high rotational speed, while full complement type is suitable for heavy loads at low rotational speed. Roller guiding methods Comparison of maximum rotational speed Comparison of basic dynamic load rating Caged type Full complement type 5 6 8 10 12 16 18 20 24 30 Size of Cam Follower 0 10 000 20 000 30 000 40 000 50 000 60 000 70 000 80 000 B as ic d yn am ic lo ad r at in g C （ N ） Caged type Full complement type 5 6 8 10 12 16 18 20 24 30 Size of Cam Follower 0 5 000 10 000 15 000 20 000 25 000 30 000 R ot at io na l s p ee d m in -1 Caged type, oil lubrication Full complement type, oil lubrication Caged type, grease lubrication Full complement type, grease lubrication 3 – 30 3 – 30 3 – 30 3 – 30 3 – 20 3 – 20 3 – 5 3 – 5 6 – 30 6 – 30 6 – 30 6 – 30 CF···BR CF···BUUR CF···B CF···BUU CF···FBR CF···FBUUR CF···FB CF···FBUU CF···VBR CF···VBUUR CF···VB CF···VBUU Shield type Sealed type Shield type Sealed type Shield type Sealed type Shield type Sealed type Shield type Shield type Shield type Shield type Crowned outer ring Cylindrical outer ring Crowned outer ring Cylindrical outer ring Crowned outer ring Cylindrical outer ring Crowned outer ring Cylindrical outer ring Hex socket Hex socket Hex socket High carbon steel Stainless steel High carbon steel Caged Full complement 3 – 20 3 – 20 3 – 5 3 – 5 CF···WBR CF···WBUUR CF···FWBR CF···FWBUUR Shield type Sealed type Shield type Sealed type Crowned outer ring Crowned outer ring Hex socket Hex socket High carbon steel Stainless steel Caged 6 – 20CF-SFU···BSealed typeCylindrical outer ring Hex socketHigh carbon steel Caged 6 – 20CF···WBUUR/SGSealed typeCrowned outer ring Hex socketHigh carbon steel Caged 10 – 30NUCF···BRSealed typeCrowned outer ring Hex socketHigh carbon steel Caged 6 – 18 6 – 18 6 – 18 6 – 18 CFES···BR CFES···BUUR CFES···B CFES···BUU Shield type Sealed type Shield type Sealed type Hex socketHigh carbon steel Cage 6 – 30 6 – 30 6 – 30 6 – 30 6 – 30 6 – 30 6 – 30 6 – 30 CFE···BR CFE···BUUR CFE···B CFE···BUU CFE···VBR CFE···VBUUR CFE···VB CFE···VBUU Shield type Sealed type Shield type Sealed type Shield type Sealed type Shield type Sealed type Crowned outer ring Cylindrical outer ring Crowned outer ring Cylindrical outer ring Hex socket Hex socket High carbon steel High carbon steel Caged Full complement Hex Head Cam Followers come with shield type or sealed type. Shield type makes narrow clearances between outer ring and stud flange, also between outer ring and side plate forming labyrinths. Sealed type incorporates special seals internally to prevent the penetration of foreign particles. Sealing structure The outside shapes of the Hex head Cam Followers, which makes direct contact with the mating track surface, are either crowned or cylindrical. The crowned outer ring is effective in moderating the edge load due to mounting errors. The cylindrical outer ring has a large contact area with the mating track surface, and is suitable for applications in which the applied load is large or the track surface hardness is low. Shape of outer ring surface Stainless steel series is superior in corrosion resistance and suitable for applications where oil cannot be used or water splashes exist and in clean rooms. Available in High carbon steel and Stainless steel Comparison of track capacity Crowned outer ring Cylindrical outer ring Shield type Sealed type High carbon steel Stainless steel R 5 6 8 10 10-1 12 12-1 16 18 20 20-1 24 24-1 30 30-1 30-2 Size 0 10 000 20 000 30 000 40 000 50 000 60 000 70 000 Tr ac k ca p ac ity （ N ） Crowned outer ring Cylindrical outer ring New and Wide variations of Hex Head Cam Followers Type Caged or Full complement Seal structureMaterial Model code Shape of outer ring Stud diameter (mm) Shape of stud head Heavy Duty Type Cam Follower NUCF···BR Standard Type Cam Follower CF···B Solid Eccentric Stud Type Cam Follower CFES···B Eccentric Type Cam Follower CFE···B C-Lube Cam Follower CF···WB···/SG Thrust Disk Type Cam Follower CF···WB Easy Mounting Type Cam Follower CF-SFU···B Material code No symbol F Carbon steel Stainless steel See Table 2 Identification Number 5 The identification number examples of Hex Head Cam Followers are shown below. 6 Examples of identification number Example 1 Example 2 Example 3 Example 4 CF CF CF CF 10 5 8 5 F F B B B B UU UU UU R R R W W /SG V Model code CF…B CFES…B CFE…B CF…WB CF-SFU…B CF…WB…/SG NUCF…B Standard type Cam Follower Solid Eccentric Stud type Cam Follower Eccentric type Cam Follower Thrust Disk type Cam Follower Easy Mounting type Cam Follower C-Lube Cam Follower Heavy Duty type Cam Follower Roller guiding method No symbol V Caged type Full complement type Seal structure No symbol UU Shield type Sealed type Shape of outer ring No symbol R Cylindrical outer ring Crowned outer ring Accuracy Tolerances of Hex Head Cam Followers series are shown in table 1 and 2. Cam Followers with special accuracy are also available. Please contact . Clearances Internal clearances of Hex Head Cam Follower are shown in Table 3. Table 1 Tolerances Table 2 Accuracy of outer ring (for cylindrical outer ring) Type Dimensions and symbols Crowned outer ring Cylindrical outer ring Out side dia. of outer ring D Stud dia. d1 Width of outer ring C 0 －50 h7 0 －120 unit: μm unit: μm Table 3 Radial internal clearance Model code(1) Min. Radial internal clearance Max. CF 3B～CF 5B CF 6B CF 8B～CF12-1B CF16B～CF20-1B CF24B～CF30-2B NUCF10 BR～NUCF24 BR NUCF24-1BR～NUCF30-2BR 3 5 5 10 10 20 25 17 20 25 30 40 45 50 unit: μm D Nominal outside dia. of outer ring mm ∆Dmp Single plane mean outside dia. deviation VDsp Outside dia. variation in a single radial plane (Max.) VDmp Mean outside dia. Variation (Max.) Kea Radial runout of assembled bearing outer ring (Max.)over incl high low 6 18 30 50 80 18 30 50 80 120 0 0 0 0 0 － 8 － 9 －11 －13 －15 10 12 14 16 19 6 7 8 10 11 15 15 20 25 35 Note(1) Only representative types are shown in the table. Size Stud dia. (Unit: mm) 1N=0.102kgf=0.2248lbs. 1mm=0.03937inch － 〇(2) 〇(3) 〇(2) 〇(4) － － － － － － 〇 － － 〇 Position of oil hole Size of stud dia. d1(1) mm ① Stud- head ② Stud outside surface ③ Stud- end Standard type Cam Follower Solid Eccentric Stud type Cam Follower Eccentric type Cam Follower Thrust Disk type Cam Follower Heavy Duty type Cam Follower Easy Mounting type Cam Follower d1≦ 4 5≦d1≦10 12≦d1 d1≦10 12≦d1 － － － 〇(5) － － C-Lube Cam Follower d1≦10 12≦d1 Note(1) In Eccentric type(CFE), select Cam Follower by dimension “G” on dimension table instead of “d1”. However, the oil hole on stud outside surface cannot be used. (2) Grease can be supplied through the lubrication plug in the hex head. (3) The grease nipple is provided in the hex head. Re-lubrication is possible from a grease nipple inside of hexagon hole in stud- head by inserting appended grease nipple into stud-end for plugging purpose. (4) Grease can be supplied through the grease nipple in the hex head. (5) Grease cannot be supplied to the bearing space since the space is filled with a solid thermosetting resin lubricant C-Lube. 87 Fit Maximum Allowable Load Track Capacity Allowable Rotational Speed The recommended tolerance of mounting hole for the stud of Hex Cam Follower is H7. Tolerances of mounting hole are shown in Table 4. Since the Cam Follower is supported in a cantilever position, the mounting hole diameter should be prepared without play between the stud and the hole especially when heavy shock loads may be applied. The applicable load on Hex Cam Followers is, in some cases, limited by the bending strength and shear strength of the stud and the strength of the outer ring instead of the load rating of the needle roller bearing. Therefore, the maximum allowable static load is specified by the limitations of those strengths. Track capacity is defined as a load which can be continuously applied on Hex Cam Followers placed on a steel track surface without causing deformation or indentation on the track surface when the outer ring of the Cam Follower makes contact with the mating track surface (plane). The track capacities shown in Table 5 are applicable when the hardness of the mating track surface is 40HRC (Tensile strength 1250N/mm2). When the hardness of the mating track surface differs from 40HRC, the track capacity is obtained by multiplying the value by the track capacity factor shown in Table 6. If lubrication between the outer ring and the mating track surface is insufficient, seizure and/or wear may occur depending on the application. Therefore, attention must be paid to the lubrication and the surface roughness of the mating track, especially for high-speed operation such as cam mechanisms. The allowable rotational speed of Hex Head Cam Followers is affected by mounting and operating conditions. For reference, d1n values when only pure radial loads are applied should be not exceeded the value shown in Table 7. Considering that axial loads also act under actual operating conditions, the recommended d1n value is 1/10 of the value shown in the table. For reference, d1n values of Cam Followers when C-Lube Cam Follower and C-Lube Unit are mounted should be 10,000 or less. Lubrication Hole The oil hole position of Hex. Head Cam Follower is shown in Table 8. Grease should be supplied gently with a straight type grease gun as specified JIS B 9808 :1991, which is applied carefully to the nipple head from the front. Table 4 Tolerances of mounting hole Nominal outside dia. of stud mm over incl H7 High Low － 3 6 10 18 3 6 10 18 30 ＋10 ＋12 ＋15 ＋18 ＋21 0 0 0 0 0 unit: μm Table 5 Track capacity Model code Crowned outer ring(1) Track capacity Model code Cylindrical outer ring(1) Track capacity CF 3 BR CF 4 BR CF 5 BR CF 6 BR CF 8 BR CF10 BR CF10-1BR CF12 BR CF12-1BR CF16 BR CF18 BR CF20 BR CF20-1BR CF24 BR CF24-1BR CF30 BR CF30-1BR CF30-2BR 542 712 794 1 040 1 330 1 610 2 030 2 470 2 710 3 060 3 660 5 190 4 530 6 580 8 020 9 220 9 990 10 800 CF 3 B CF 4 B CF 5 B CF 6 B CF 8 B CF10 B CF10-1B CF12 B CF12-1B CF16 B CF18 B CF20 B CF20-1B CF24 B CF24-1B CF30 B CF30-1B CF30-2B 1 360 1 790 2 210 3 400 4 040 4 680 5 530 7 010 7 480 11 200 14 500 23 200 21 000 34 300 39 800 52 700 56 000 59 300 unit: N Table 6 Track capacity factor Hardness HRC Tensile strength N/mm2 Track capacity factor Crowned outer ring Cylindrical outer ring 20 25 30 35 38 40 42 44 46 48 50 52 54 56 58 760 840 950 1 080 1 180 1 250 1 340 1 435 1 530 1 635 1 760 1 880 2 015 2 150 2 290 0.22 0.31 0.45 0.65 0.85 1.00 1.23 1.52 1.85 2.27 2.80 3.46 4.21 5.13 6.26 0.37 0.46 0.58 0.75 0.89 1.00 1.15 1.32 1.51 1.73 1.99 2.29 2.61 2.97 3.39 Note(1) Only representative types are shown in the table. 140 000 70 000 110 000 Table 7 d1n values of Hex Head Cam Followers Lubricant Type Grease Oil Caged type Full Complement type Heavy Duty type 84 000 42 000 66 000 Note d1n value ＝d1×n where, d1：Stud diameter mm n：Rotational speed rpm ③ ② ① Table 8 Position of oil hole 〇：Oil hole is prepared. Type Shape and dimension Applicable grease nipple or lubrication plug B-5120R NPT4-1 NPT6-1 NPF4-1（1） NPF6-1（1） Re-greasing fitting（1） NPF4-1（1） NPF6-1（1） A-5120V A-5240V B-5120V B-5240V φ 5 PT1/8 120 29 Width across flats 12 Width across flats 12 φ 5 PT1/8 240 29 Width across flats 12 Width across flats 12 A-5126T A-5120R PT1/8 29120 R2.5 φ 5 Width across flats 12 Width acrossflats 12 φ 1. 5 PT1/8 29 φ 5 126 17 ° Width across flats 12 Width across flats 12 PT1/8 φ 5 φ 5 29120 R2.5 Width across flats 12 Width across flats 12 φ 5 φ 5 PT1/8 120 29 Width across flats 12 Width across flats 12 φ 5 PT1/8 240 29 φ 5 Width across flats 12 Width across flats 12 Note(1) HSP-3 (by Yamada Corp.) is also available to lubricate. Remark Supply nozzles shown in the table can be mounted on the main body of a common grease gun available on the market (shown below). If these supply nozzles are required, consult by specifying the supply nozzle type. Table 9 Applicable supply nozzles Main body of grease gun Supply nozzle When NPT type grease nipple is attached, direct re-greasing without lubrication nozzle (Table 9) is possible. For CF 3, CF 4 and C-Lube Cam Followers, re-lubrication is not possible by structural reason. 1N=0.102kgf=0.2248lbs. 1mm=0.03937inch 109 Lubrication Grease pre-packed Cam Followers are shown in Table 10. The pre-packed grease is ALVANIA GREASE S2 (SHELL). For Cam Followers without pre-packed grease, grease should be packed through the oil hole in the stud. If they are operated without grease, wear of rolling contact surface may take place, leading to short bearing life. Mounting ●1 Set the center axis of the mounting hole perpendicularly to the moving direction of Hex Head Cam Follower and match the side shoulder accurately with the seating surface indicated by dimension “ f ” in the dimension tables. (See Fig.1) Then, fix the Cam Follower with the nut. Do not hit the flange head of Hex Head Cam Follower directly with a hammer, etc. This may lead to a bearing failure such as irregular rotation or cracking. ●4 In case of Solid Eccentric Stud type Cam Followers and Eccentric Type Cam Followers, the outer ring position can be adjusted appropriately by turning the hexagon hole of the stud head. The stud is fixed with a nut and a spring washer, etc. The tightening torque should not exceed the values of maximum tightening torque shown in the table of dimensions. When shock loads are applied and the adjusted eccentricity has to be ensured, it is recommended to make holes in the housing, stud and eccentric collar, and fix the stud with a dowel pin as shown in Fig. 3. However, when the stud diameter is less than 8mm (Eccentric collar diameter 11mm), the stud is through-hardened. ●3 When tightening the nut, the tightening torque should not exceed the values shown in the dimension tables. If the tightening torque is too large, it is possible that the threaded portion of the stud can be broken. When there is a possibility of loosening, a special nut such as a lock nut, spring washer or self-locking nut should be used. Special Specification Appended grease nipple in delivery can be changed to the grease nipple shown in Table 13. In these types, re- lubrication is directly possible by using straight type grease gun as specified JIS B 9808:1991 If required, indicate “/NP” at the end of supplemental code. Operating Temperature Range The operating temperature range for Hex Head Cam Follower is –20˚C to +120˚C. However, the maximum allowable temperature range for the following types are different. The maximum allowable temperature for Standard type Cam Follower and Thrust Disk type Cam Follower with carbon steel stud diameter d1 of 4mm or less and stainless steel stud diameter d1 of 5mm or less is +110˚C and +100˚C when they are continuously operated. The maximum allowable temperature for the sealed type with a stud diameter d1 of 5mm or less is +80˚C. Use C-Lube Cam Follower and C-Lube Units in the bearing temperature range of -15˚C to +80˚C. For long continuous use, the recommended operating temperature is 60˚C maximum. Type Size of stud dia. d1(1) mm Caged type Shield type Sealed type Full comple- ment type Standard type Cam Follower Solid Eccentric Stud type Cam Follower Eccentric type Cam Follower Thrust Disk type Cam Follower Easy Mounting type Cam Follower C-Lube Cam Follower(2)