PBUS SERIES GUIDELINES
• Concentricity of the inner race and the outer race are maintained by the plain bearing located between the outer race and the shaft. Radial load which works on the outer race is also supported by this plain bearing. The shaft must therefore extend completely through the clutch and support the full length. • Recommended shaft tolerances are as follows:
Tolerance
Model PBUS 3 PBUS 5 PBUS 6 PBUS 8 PBUS 10 PBUS 12 PBUS 14
inch.
(mm)
+0 to –0.0005" +0 to –0.0005" +0 to –0.0005" +0 to –0.0005" +0 to –0.0006" +0 to –0.0006" +0 to –0.0006"
+0 to –0.013 +0 to –0.013 +0 to –0.013 +0 to –0.013 +0 to –0.016 +0 to –0.016 +0 to –0.016
• Do not use the PB Series Cam Clutch as a coupling. Use with a flexible coupling when connecting two shafts. • Vertical mount Cam Clutch applications require special treatment, please contact Tsubaki. • Thrust load should be supported by other devices, not by the Cam Clutch. • The bore of the driven member, such as a sprocket on the clutch outer race, should be in accordance with specifications below.
Model PBUS 3 PBUS 5 PBUS 6 PBUS 8 PBUS10 PBUS12 PBUS14
Bore Diameter of Driven Member 0.875/0.876 inches (22.225/22.250 mm) 1.250/1.251 inches (31.750/31.775 mm) 1.375/1.376 inches (34.925/34.950 mm) 1.750/1.751 inches (44.450/44.475 mm) 2.250/2.251 inches (57.150/57.175 mm) 2.500/2.501 inches (63.500/63.525 mm) 2.875/2.876 inches (73.025/73.050 mm)
Typical installation
TSS AND TFS SERIES GUIDELINES • TSS and TFS Series Cam Clutches are designed for press fit installations. Bearings are required for both series to support axial and radial loads. These are "open" design clutches, thus lubrication and external sealing is required. • Correct interference dimensions of the outer race must be maintained to obtain maximum clutch performance. TSS Series has the same outside dimensions as the 62 Series ball bearings and the same housing tolerances should be maintained. TFS Series corresponds with the 63 Series ball bearings and similar machining tolerances are needed. In most applications, the TSS or TFS Cam Clutch is installed next to the bearing. • TFS Series Cam Clutch has keyseats on the end faces; keyways should be added for installation. If TFS Series is used without locating keys in these end faces and is installed via a press fit, the internal diameter of the housing is to be a K6 tolerance. Shaft and Housing Bore Tolerances TSS Series TFS Series Housing bore: H6, H7, or J7 tolerance Housing bore: H6, H7, or J7 tolerance (K6 if press fit) Shaft diameter: See page 93 Shaft diameter: See page 93 Bearing support: 62 series Bearing support: 63 series Shaft and Housing Alignment Concentricity
Total Indicator Run-out (TIR)
Bore Range (mm)
Series
inch.
(mm)
TSS and TFS TSS and TFS TSS and TFS
6 - 12
0.0008" 0.0012" 0.0020"
0.020 mm 0.030 mm 0.050 mm
15 - 25 30 - 80
96
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