Machine Screw Bearing Blocks

Joyce/Dayton bearing mounts are sealed and greased at the factory.  They are suited for high duty cycle conditions where frictional forces cause a thermal transfer of energy into the screw assembly. The resulting thermal migration will cause the screw to expand axially. Screw end machining and fit of the bearing support are designed to account for this expansion.

See the table below for dimensional details based on machine screw part numbers. Bearing blocks used in screw & nut assemblies may not be rated for the same static load as the screws or nuts with which they are used. Contact Joyce/Dayton to verify that bearing blocks are adequately sized for the required loads.

Standard bearing blocks are available for most screw diameters between 5/8 inch and 1 1/2 inch diameters. See the chart below for more details.

SB Bearing Blocks

simple single bearing block SB

Screw NumberBearing Mount No.ABCDEFGHIJK
SS063R013S SB-10 3.000 1.875 1.000 0.375 1.125 1.125 2.250 0.672 1.344 .281 (4x) .406 Thru
SS063R025S .625 C'Bore
SS063R050A .875 Deep
AS075R020A SB-12 3.000 1.875 1.000 0.375 1.125 1.125 2.250 0.672 1.344 .281 (4x) .406 Thru
AS088R050A .625 C'Bore
  .875 Deep
AS100R025A SB-15 3.500 2.125 1.125 0.375 1.375 1.250 2.500 0.813 1.625 .281 (4x) .406 Thru
AS100R050A .625 C'Bore
  1.000 Deep
AS100R010A SB-20 4.500 2.750 1.438 0.500 1.750 1.625 3.250 0.938 1.875 .469 (4x) .656 Thru
SS100R100A 1.000 C'Bore
AS125R025A 1.312 Deep
AS150R025A SB-25 6.500 3.690 1.875 0.875 2.000 2.375 4.750 0.970 1.940 .656 (4x) .906 Thru
AS150R038A 1.375 C'Bore
AS150R050A 1.750 Deep
SS150R038A SB-30 6.500 3.690 1.875 0.875 2.000 2.375 4.750 1.156 2.312 .656 (4x) .906 Thru
AS200R025A 1.375 C'Bore
AS200R050A 2.060 Deep

 

FB Bearing Blocks

fixed double bearing block FB10-15

fixed double bearing block FB20-30

Screw NumberBearing Mount No.ABCDEFGHIJKL
SS063R013S FB-10 3.000 1.875 1.000 1.125 3.450 0.375 2.250 1.500 0.938 1.875 .250 Thru .406 Thru
SS063R025S .375 C'Bore .625 C'Bore
SS063R050A #5 Taper Pin 1.130 Deep
AS075R020A FB-12 3.000 1.875 1.000 1.125 4.262 0.438 2.250 1.688 1.063 2.125 .250 Thru .406 Thru
AS088R050A .375 C'Bore .625 C'Bore
  #5 Taper Pin 1.130 Deep
AS100R025A FB-15 3.500 2.125 1.125 1.250 4.585 0.500 2.500 1.875 1.188 2.375 .250 Thru .406 Thru
AS100R050A .375 C'Bore .625 C'Bore
  #5 Taper Pin 1.130 Deep
AS100R010A FB-20 4.500 2.750 1.438 1.625 5.015 0.937 3.250 N/A 2.125 2.750 .437 Thru .688 Thru
SS100R100A .687 C'Bore 1.000 C'Bore
AS125R025A #8 Taper Pin 1.625 Deep
AS150R025A FB-25 6.500 3.690 1.875 2.375 5.977 0.970 4.750 N/A 2.750 3.250 .437 Thru .937 Thru
AS150R038A .687 C'Bore 1.375 C'Bore
AS150R050A #8 Taper Pin 2.250 Deep
SS150R038A FB-30 6.500 3.690 1.875 2.375 6.595 1.156 4.750 N/A 3.225 3.725 .437 Thru .937 Thru
AS200R025A .687 C'Bore 1.375 C'Bore
AS200R050A #8 Taper Pin 2.250 Deep

 

DB Bearing Blocks

simple double bearing block DB10-30

simple double bearing block DB45

Screw NumberBearing Mount No.ABCDEFGHIJKL
SS063R013S DB-10 3.000 1.875 1.000 0.375 1.125 1.125 2.250 0.672 1.344 .281 (4x) .406 Thru N/A
SS063R025S .625 C'Bore
SS063R050A .875 Deep
AS075R020A DB-12 3.000 1.875 1.000 0.375 1.125 1.125 2.250 0.672 1.344 .281 (4x) .406 Thru N/A
AS088R050A .625 C'Bore
  .875 Deep
AS100R025A DB-15 3.500 2.125 1.125 0.375 1.375 1.250 2.500 0.813 1.625 .281 (4x) .406 Thru N/A
AS100R050A .625 C'Bore
  1.000 Deep
AS100R010A DB-20 4.500 2.750 1.438 0.500 1.750 1.625 3.250 0.938 1.875 .469 (4x) .656 Thru N/A
SS100R100A 1.000 C'Bore
AS125R025A 1.312 Deep
AS150R025A DB-25 6.500 3.690 1.875 0.875 2.000 2.375 4.750 0.970 1.940 .656 (4x) .906 Thru N/A
AS150R038A 1.375 C'Bore
AS150R050A 1.750 Deep
SS150R038A DB-30 6.500 3.690 1.875 0.875 2.000 2.375 4.750 1.156 2.312 .656 (4x) .906 Thru N/A
AS200R025A 1.375 C'Bore
AS200R050A 2.060 Deep
AS250R025A DB-45 8.500 5.625 2.813 1.000 3.625 3.313 6.625 0.873 3.468 .813 (6x) 1.013 Thru 1.720
AS250R050A 1.563 C'Bore
  3.500 Deep