Machine Screw End Conditions

It is no surprise that Joyce/Dayton offers complete end machining to fit our standard bearing blocks. But did you know that we also provide finished machining for customer-specified end requirements? It is easy to order the finished screws - just send us your specifications.

Note: Our 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.

SB Screw End Conditions

Screw NumberBearing Mount No.o S1A1A2A3A4A5A6o A7A8A9A10A11
SS050R013A   0.3544 0.750 0.290 N/A N/A 0.315 0.875 0.88 5/16-24 UNF N/A N/A 629
  0.3541
SS063R013S SB-10 0.3940 0.650 0.330 0.44 0.127 0.354 0.800 1.00 .391-32 UNS W-00 N-00 6200
SS063R025S 0.3936 0.125
SS063R050A    
AS075R020A SB-12 0.4726 0.890 0.450 0.56 0.127 0.472 1.029 1.25 .469-32 UNS W-01 N-01 6301
AS088R050A 0.4723 0.125
AS100R025A SB-15 0.5908 0.930 0.490 0.56 0.127 0.512 1.094 1.38 .586-32 UNS W-02 N-02 6302
AS100R050A 0.5905 0.125
AS100R010A SB-20 0.7877 1.070 0.570 0.63 0.190 0.590 1.305 1.75 .781-32 UNS W-04 N-04 6304
SS100R100A 0.7873 0.188
AS125R025A    
AS150R025A SB-25 0.9846 1.190 0.650 0.70 0.190 0.669 1.420 2.06 .969-32 UNS W-05 N-05 6305
AS150R038A 0.9842 0.188
AS150R050A    
SS150R038A SB-30 1.1814 1.275 0.720 0.70 0.190 0.748 1.587 2.43 1.173-18 UNS W-06 N-06 6306
AS200R025A 1.1810 0.188
AS200R050A    
AS250R025A   1.5752 1.470 0.880 0.74 0.315 0.906 1.875 3.10 1.563-18 UNS W-08 N-08 6308
AS250R050A 1.5747 0.313
AS250R025A   1.7721 1.550 0.960 0.80 0.315 0.984 2.000 3.50 1.767-18 UNS W-09 N-09 6309
AS250R050A 1.7716 0.313

 

FB Screw End Conditions

Screw NumberBearing Mount No.oS1oS2A1A2A3A4A5A6A7A8A9A10A11
SS050R013A   0.3544 0.250 3.23 2.60 1.98 1.240 0.315 0.063 0.035 5/16-24 UNF N/A N/A 3/32 x 1/2
  0.3541 0.249
SS063R013S FB-10 0.3940 0.312 3.50 2.75 2.25 1.515 0.354 0.825 0.050 .391-32 UNS W-00 N-00 1/8 x 1/2
SS063R025S 0.3936 0.311
SS063R050A    
AS075R020A FB-12 0.4726 0.406 4.30 3.00 2.35 1.850 0.472 0.923 0.038 .469-32 UNS W-01 N-01 1/8 x 5/8
AS088R050A 0.4723 0.405
AS100R025A FB-15 0.5908 0.500 4.62 3.31 2.73 2.000 0.512 0.995 0.035 .586-32 UNS W-02 N-02 1/8 x 5/8
AS100R050A 0.5905 0.499
AS100R010A FB-20 0.7877 0.625 5.05 3.80 3.10 2.375 0.590 1.217 0.035 .781-32 UNS W-04 N-04 3/16 x 5/8
SS100R100A 0.7873 0.624
AS125R025A    
AS150R025A FB-25 0.9846 0.750 6.06 4.50 3.75 2.815 0.669 1.500 0.083 .969-32 UNS W-05 N-05 3/16 x 1
AS150R038A 0.9842 0.749
AS150R050A    
SS150R038A FB-30 1.1814 1.000 6.67 4.92 4.20 3.300 0.748 1.828 0.075 1.173-18 UNS W-06 N-06 1/4 x 1
AS200R025A 1.1810 0.999
AS200R050A    
AS250R025A   1.5752 1.375 8.15 5.90 5.13 4.236 0.906 2.450 0.035 1.563-18 UNS W-08 N-08 5/16 x 1 1/2
AS250R050A 1.5747 1.374
AS250R025A   1.7721 1.375 8.62 6.37 5.63 4.694 0.984 2.750 0.035 1.767-18 UNS W-09 N-09 5/16 x 1 1/2
AS250R050A 1.7716 1.374

 

DB Screw End Conditions

Screw NumberBearing Mount No.oS1oS2A1A2A3A4A5A6A7A8A9
SS050R013A   0.3544 0.250 2.45 1.82 1.320 0.315 0.035 5/16-24 UNF N/A N/A 3/32 x 1/2
  0.3541 0.249
SS063R013S DB-10 0.3940 0.312 2.84 2.09 1.700 0.354 0.000 .391-32 UNS W-00 N-00 1/8 x 1/2
SS063R025S 0.3936 0.311
SS063R050A    
AS075R020A DB-12 0.4726 0.406 3.29 2.00 1.566 0.472 0.000 .469-32 UNS W-01 N-01 1/8 x 5/8
AS088R050A 0.4723 0.405
AS100R025A DB-15 0.5908 0.500 3.59 2.59 2.145 0.512 0.040 .586-32 UNS W-02 N-02 1/8 x 5/8
AS100R050A 0.5905 0.499
AS100R010A DB-20 0.7877 0.625 4.00 2.88 2.378 0.590 0.040 .781-32 UNS W-04 N-04 3/16 x 5/8
SS100R100A 0.7873 0.624
AS125R025A    
AS150R025A DB-25 0.9846 0.750 4.45 2.89 2.328 0.669 0.000 .969-32 UNS W-05 N-05 3/16 x 1
AS150R038A 0.9842 0.749
AS150R050A    
SS150R038A DB-30 1.1814 1.000 5.33 3.60 3.047 0.748 0.063 1.173-18 UNS W-06 N-06 1/4 x 1
AS200R025A 1.1810 0.999
AS200R050A    
AS250R025A   1.5752 1.375 6.93 4.43 3.800 0.906 0.063 1.563-18 UNS W-08 N-08 5/16 x 1 1/2
AS250R050A 1.5747 1.374
AS250R025A DB-45 1.7721 1.375 6.68 4.49 3.875 0.984 0.063 1.767-18 UNS W-09 N-09 5/16 x 1 1/2
AS250R050A 1.7716 1.374