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SERIES O.D. PILOT S B.C. QTY SIZE SPLINE OVERALL THRU HUB SURFACE PART NUMBER F P BC BH BH L L1 H 1100 3.500 2.250 F 2.750 4 .313 1.00-.25k 2.125 1.500 1.8750 TURNED 1-1-143 1310 3.875 2.375 F 3.125 4 .375 0.87-13 2.000 2.4375 TURNED 131N-20-13420 1310 3.875 2.375 F 3.125 4 .375 1.50-.37K 2.625 2.000 2.3750 GROUND 2-1-684 1310 3.875 2.375 F 3.125 4 .391 1.50-10 2.313 1.780 2.2090 GROUND 131N-20-5680 1310 3.875 2.375 F 3.125 4 .406 1.75-13 2.375 2.281 TURNED 131N-20-12900 1350 4.625 2.750 F 3.750 4 .438 1.00 3.438 2.625 2.8750 TURNED 3-1-303 1350 4.625 2.750 F 3.750 4 .438 1.18-6 2.000 1.469 1.6920 POLISHED 135N-20-8300 1350 4.625 2.750 F 3.750 4 .438 1.37-.31K 2.563 2.000 2.8750 TURNED 135N-20-9410 1350 4.625 2.750 F 3.750 4 .438 1.37-.31K 2.560 2.000 2.8750 TURNED 135N-20-9910 1350 4.625 2.750 F 3.750 4 .438 1.37-.37K 2.563 2.000 2.2500 GROUND 135N-1-584 1350 4.625 2.750 F 3.750 4 .438 1.37-10 2.438 2.000 2.1094 GROUND 3-1-2011 1350 4.625 2.750 F 3.750 4 .438 1.37-10 2.438 2.000 2.1094 GROUND 141N-20-10910 1350 4.625 2.750 F 3.750 4 .438 1.37-10 2.438 2.000 2.1250 GROUND 3-1-751 1350 4.625 2.750 F 3.750 4 .438 1.37-10 2.688 2.000 2.0000 TURNED 141N-20-12370 1350 4.625 2.750 F 3.750 4 .438 1.37-10 2.688 2.000 2.1250 TURNED 141N-20-12380 1350 4.625 2.750 F 3.750 4 .453 1.37-10 3.000 2.000 2.1300 POLISHED 3-1-3451X 1350 4.625 2.750 F 3.750 4 .438 1.40-32 2.500 2.000 2.1250 POLISHED 135N-20-12560 1350 4.625 2.750 F 3.750 4 .453 1.50-.37 3.060 2.190 2.2500 GROUND 135N-20-7030 1350 4.563 2.750 F 3.750 4 .438 1.50-.37K 2.000 2.000 2.8750 TURNED 3-1-1013-8 1350 4.625 2.750 F 3.75 4 .438 1.50-10 2.250 1.750 2.1875 135N-20-15320 1350 4.625 2.750 F 3.750 4 .438 1.50-10 2.438 2.000 2.1250 GROUND 3-1-2431 1350 4.625 2.750 F 3.750 4 .438 1.50-10 2.563 2.000 2.1250 GROUND 3-1-2181 1350 4.625 2.750 F 3.750 4 .438 1.50-10 2.563 2.000 2.1250 GROUND 3-1-1151 1350 4.625 2.750 F 3.750 4 .453 1.50-10 2.625 1.750 2.2550 GROUND 135N-20-4520 1350 4.625 2.750 F 3.750 4 .438 1.50-10 2.688 2.000 2.1250 POLISHED 141N-20-12390 1350 4.625 2.750 F 3.750 4 .438 1.50-10 2.688 2.000 2.1875 TURNED 135N-20-13110 1350 4.625 2.750 F 3.750 4 .453 1.50-10 3.060 2.188 2.2550 GROUND 135N-20-0350 1350 4.563 2.750 F 3.75 4 .438 1.50-17 2.000 1.934 2.8750 135N-20-15270 1350 4.063 2.750 F 3.750 4 .438 1.62-.31K 3.438 2.625 2.4380 TURNED 135N-20-8570 1350 4.625 2.750 F 3.750 4 .438 1.75-.37K 3.438 2.625 2.8750 TURNED 135N-20-9900 1350 4.563 2.750 F 3.750 4 .438 1.75-.43K 3.000 2.250 ROUGH 135N-20-7840 1350 4.625 2.750 F 3.750 4 .438 1.75-10 2.438 2.000 2.6250 GROUND 141N-1-3571 1350 4.625 2.750 F 3.750 4 .438 1.75-10 2.438 2.000 2.6250 GROUND 3-1-3571 1350 4.625 2.750 F 3.750 4 .438 1.75-10 2.813 2.188 2.2500 GROUND 3-1-3211 1350 4.625 2.750 F 3.750 4 .438 1.75-10 2.875 2.250 2.5000 TURNED 3-1-3111 1350 4.625 2.750 F 3.750 4 .438 1.75-10 2.875 2.250 2.5000 GROUND 3-1-3121X 1350 4.625 2.750 F 3.750 4 .438 1.75-10 3.125 2.250 2.6250 GROUND 3-1-1521 1350 4.563 2.750 F 3.750 4 7/16-20 12.25-.50K 3.000 3.000 4.5625 TURNED 3-1-1023-10 1480 5.875 3.750 F 4.750 4 .500 1.75-10 2.875 2.745 2.6250 GROUND 148N-20-16630 1550 5.875 3.750 F 4.750 4 .500 1.25-10 2.000 1.750 2.5000 TURNED 148N-20-5120 1550 5.875 3.750 F 4.75 4 0.5 1.37-10 2.125 2.125 2.1250 4-1-1011 1550 5.875 3.750 F 4.750 4 .500 1.37-10 2.625 2.000 2.1094 GROUND 4-1-3151 1550 5.750 3.750 F 4.750 4 .500 1.37-10 2.630 2.000 2.1280 GROUND 155N-20-6980 1550 5.875 3.750 F 4.750 4 .500 1.50-10 2.500 2.000 2.2410 GROUND 148N-1-3441 1550 5.875 3.750 F 4.750 4 .500 1.50-10 2.500 2.000 2.2500 GROUND 4-1-3441 1550 5.875 3.750 F 4.750 4 .500 1.50-10 2.625 2.000 2.1250 GROUND 4-1-2701 1550 5.750 3.750 M 4.750 4 .500 1.517-35 2.500 2.000 2.1250 GROUND 155N-20-14320 1550 5.750 3.750 M 4.750 4 .500 1.52-35 2.500 2.000 2.5000 POLISHED 155N-20-13640 1550 5.875 3.750 F 4.750 4 .500 1.62-10 2.750 2.125 2.3750 GROUND 4-1-2751 1550 5.875 3.750 F 4.750 4 .500 1.75-10 2.688 2.063 2.5000 TURNED 155N-20-13430 1550 4.750 3.750 M 4.750 4 .500 1.78-34 2.500 2.000 2.5000 GROUND 155N-20-14260 1550 5.750 3.750 M 4.75 4 .500 1.79-34 3.313 2.250 2.5000 155N-20-15470 1550 5.750 3.750 F 4.750 4 .500 1.79-34 2.500 2.000 2.5000 GROUND 155N-20-16720 1550 5.875 3.750 F 4.750 4 .500 2.00-10 3.625 3.000 2.9375 GROUND 4-1-2361 1550 5.875 3.750 F 4.750 4 .500 2.00-6 3.625 2.250 3.0030 POLISHED 148N-1-720W 1550 5.875 3.750 F 4.750 4 .500 2.16-.63K 3.500 3.500 3.7500 GROUND 155N-20-12280 1550 5.875 3.750 F 4.750 4 .500 2.25-10 2.625 2.000 2.7968 GROUND 4-1-2591 1550 5.875 3.750 F 4.750 4 .500 2.25-10 3.688 3.000 3.5000 GROUND 155N-20-12270 1610 6.875 6.625 F 6.125 8 .375 1.25 3.500 3.500 5.2500 TURNED 16N-1-873 1610 6.875 6.625 F 6.125 8 .388 1.271-19 2.560 1.440 1.9000 TURNED 161N-20-15640 1610 6.875 6.625 M 6.125 8 .375 1.50-10 2.750 2.063 2.2500 TURNED 16N-20-13500 1610 6.875 6.625 F 6.125 8 .375 1.50-10 2.750 2.063 2.2500 16N-1-1291 1610 6.875 6.625 F 6.125 8 .375 1.50-10 2.938 2.188 2.1250 GROUND 16N-20-6960 1610 6.875 6.625 F 6.125 8 .375 1.75-10 2.563 2.000 2.2550 POLISHED 16N-1-611M 1610 6.875 6.625 F 6.125 8 .375 1.75-10 2.813 2.250 3.0000 GROUND 16N-1-611 1610 6.875 6.625 F 6.125 8 .375 1.75-10 2.938 2.188 2.2550 GROUND 16N-20-6950 1610 6.875 6.625 F 6.125 8 .375 1.75-10 2.938 2.250 2.7500 GROUND 16N-1-2321 1610 6.875 6.625 F 6.125 8 .375 1.78-34 4.250 2.781 2.5625 GROUND 16N-1-5121X 1610 6.875 6.625 F 6.125 8 .375 1.96-10 3.000 2.250 2.5000 GROUND 16N-1-4291 1610 6.875 6.625 F 6.125 8 .375 2.00-10 3.625 3.000 2.7500 GROUND 16N-1-3141 1610 6.875 6.625 F 6.125 8 .375 2.12-.50K 3.500 3.500 5.2500 TURNED 16N-1-873-2 1610 6.875 6.625 F 6.125 8 .375 2.14-41 3.750 2.500 2.9400 POLISHED 16N-20-1 1610 6.875 6.625 F 6.125 8 .375 2.21-6 4.469 3.250 3.0000 GROUND 16N-1-2211 1610 6.875 6.625 M 6.125 8 .375 2.22-6 3.875 3.250 3.0000 GROUND 16N-1-2541 1610 6.875 6.625 F 6.125 8 .375 2.25-10 3.625 3.000 3.5050 POLISHED 16N-1-1581 1610 6.875 6.625 F 6.125 8 .375 2.44-63K 3.500 3.500 5.2500 TURNED 16N-1-873-5 1610 6.875 6.625 F 6.125 8 .375 2.75-10 3.688 3.000 3.5000 TURNED 16N-20-12240 1610 6.875 6.625 F 6.125 8 .375 2.94-.63K 3.000 3.406 5.2500 16N-20-12190 1710 8.000 7.750 F 7.250 8 .375 1.53-14 4.250 2.000 3.0000 TURNED 17N-20-3070 1710 8.000 7.750 F 7.250 8 .375 1.78-34 3.906 2.750 2.5625 GROUND 17N-1-4701X 1710 8.000 7.750 F 7.250 8 .375 1.96-10 2.688 2.063 2.6250 GROUND 17N-1-2131 1710 8.000 7.750 F 7.250 8 .375 1.96-10 2.688 2.250 2.6250 GROUND 17N-1-5241 1710 8.000 7.750 F 7.250 8 .375 2.00-.50K 3.688 3.000 3.2500 GROUND 17N-1-1144 1710 8.000 7.750 F 7.250 8 .375 2.00-10 3.250 2.563 2.7500 GROUND 17N-1-2791 1710 8.000 7.750 F 7.250 8 .375 2.00-10 3.438 2.250 2.7500 GROUND 17N-20-7150 1710 8.000 7.750 F 7.250 8 .375 2.00-10 3.688 3.000 2.7500 GROUND 17N-1-2221 1710 8.000 7.750 F 7.250 8 .375 2.00-10 3.688 3.000 2.9450 GROUND 17N-20-7610 1710 8.000 7.750 F 7.250 8 .375 2.18-.50K 4.000 4.000 6.3750 TURNED 17N-20-12580 1710 8.000 7.750 F 7.250 8 .375 2.25-.56K 3.688 3.000 3.5546 GROUND 17N-1-1074 1710 8.000 7.750 F 7.250 8 .375 2.25-.63K 4.000 4.000 6.3750 TURNED 17N-20-12570 1710 8.000 6.438 M 7.250 8 3/8-24 2.25-10 4.969 3.000 3.5000 GROUND 17N-1-4131 1710 8.000 7.250 F 7.250 8 .375 2.25-10 3.688 3.000 3.5000 GROUND 17N-1-951 1710 8.000 7.750 F 7.250 8 .375 2.25-10 4.438 3.625 3.0000 GROUND 17N-1-4301 1710 8.000 7.750 F 7.250 8 .375 2.39-46 4.594 3.375 3.5000 GROUND 17N-1-4671 1710 8.000 7.750 F 7.250 8 .377 2.50-10 3.620 2.410 3.5000 GROUND 17N-20-14120 1710 8.000 6.437 M 7.250 8 .375 2.50-10 3.313 2.688 2.7530 GROUND 17N-20-1610 1710 8.000 7.750 F 7.250 8 .375 2.68-.62K 4.000 4.000 6.3750 TURNED 17N-20-8530 1710 8.000 7.750 F 7.250 8 .453 2.68-.75K 3.906 3.906 6.3750 TURNED 17N-20-4100 1710 8.000 7.750 F 7.250 8 .375 2.75-10 3.688 3.000 3.5000 GROUND 17N-10-2320 1710 8.000 8.000 M 7.250 8 .375 2.75-10 3.688 3.000 3.5000 GROUND 17N-1-2381 1710 8.000 7.750 F 7.250 8 .375 3.93-.75K 4.000 4.000 6.3750 TURNED 17N-20-8540 1710 8.000 7.750 F 7.250 8 .375 3.91-1.00K 4.000 4.000 6.3750 TURNED 17N-20-8550 1710 8.000 7.750 F 7.250 8 .375 3.93B 4.000 4.000 6.3750 TURNED 17N-20-11770 1710 8.000 5.250 F 7.250 8 .438 3.94-1.00K 4.000 3.500 6.3750 TURNED 17N-20-12300 1810 8.000 7.750 F 7.250 12 .438 2.00-10 3.625 3.000 3.5000 GROUND 18N-1-1601X 1810 8.000 7.750 F 7.250 12 .438 2.00-10 3.688 3.000 2.9375 GROUND 18N-1-221 1810 8.000 7.750 F 7.250 12 .438 2.25-10 3.688 3.000 3.5000 GROUND 18N-1-151 1810 8.000 7.750 F 7.250 12 .438 2.36-18 4.031 3.375 3.5000 GROUND 18N-1-1801 1810 8.000 7.750 F 7.250 12 .438 2.37-20 2.344 3.5000 GROUND 18N-1-2161 1810 8.000 7.750 F 7.250 12 .438 2.50-.62K 4.000 4.000 6.3750 TURNED 18N-1-533-2 1810 8.000 7.750 F 7.250 12 .438 2.75-10 3.688 3.125 3.7500 POLISHED 18N-1-1651 1810 8.000 7.750 F 7.250 12 .438 2.75-10 4.060 3.000 3.5000 POLISHED 18N-1-741 1810 8.000 7.750 F 7.250 12 .438 3.00-.75K 4.000 4.000 6.3750 TURNED 18N-1-533-5 1810 8.000 7.750 F 7.250 12 .438 3.00-10 3.750 3.060 4.0030 GROUND 280.03021 1810 8.000 7.750 F 7.250 12 .438 3.44-.88K 4.000 4.000 6.3750 TURNED 18N-20-9400 1810 8.000 7.750 F 7.725 12 7/16-20 3.50 6.000 6.000 8.0000 18N-1-543 1810 8.000 7.750 F 7.250 12 .438 3.50-.87K 4.060 3.000 5.7500 TURNED 18N-20-2740 1810 8.000 7.750 F 7.25 12 0.44 3.94-1.00K 8.000 8.000 6.3750 18N-20-15330 1810 8.000 7.750 F 7.250 12 .438 3.94-1.00K 4.000 4.000 6.3750 TURNED 18N-1-533-7 1880 9.469 7.000 F 8.250 8 .625 2.50-10 4.750 3.000 3.5050 POLISHED 185N-1-81 1880 9.469 7.000 F 8.250 8 .625 2.75-10 4.188 3.125 3.7530 GROUND 8-1-201JN 1880 9.625 7.000 F 8.250 8 .625 2.75-10 4.188 3.250 3.7500 GROUND 185N-1-211X 1880 9.310 7.000 F 8.250 8 .625 3.00-10 4.750 3.000 4.0000 POLISHED 185N-20-16110 1880 8.000 7.750 F 8.250 8 .625 3.50-.875K 5.000 4.875 6.8750 TURNED 185N-20-15910 1880 9.625 7.000 F 8.250 8 .625 3.94-1.00K 5.000 5.000 6.8750 185N-1-333-5 1880 9.563 7.000 F 8.250 8 .625 4.00-1.00K 5.00 4.875 6.8750 185N-20-15900 4.720 3.126 M 3.969 4 7/16-20 1.60-15 3.156 1.750 2.1270 GROUND 20-4080 5.970 2.250 M 5.000 6 0.5 1.75-10 2.250 2.250 1.9750 TURNED 20-8100 8.000 6.438 M 7.250 8 3/8-24 1.75-10 3.688 2.000 3.1250 TURNED 20-12930 5.905 3.543 M 5.118 8 .483 1.25-13 3.469 2.677 3.3400 TURNED 20-8180 6.000 5.625 F 4.700 6 1/2-20 1.75-6 3.875 2.250 2.5000 20-11310 6.225 5.087 M 5.586 12 .344 2.00-10 3.000 3.000 2.7510 GROUND 20-2730 7.750 7.750 M 6.250 4 .875 2.00-10 3.875 3.000 3.2530 GROUND 5WCS32-60 8.500 5.875 M 7.250 12 .656 2.02-39 3.125 2.437 2.7500 GROUND 20-0050 5.906 3.543 M 5.118 8 .476 2.04-15 3.540 2.750 3.3438 TURNED 20-13050 7.093 4.329 F 6.122 8 .563 2.50-10 3.500 3.375 5.2500 20-11580 9.843 5.512 M 8.584 8 .708 2.75-10 4.000 3.000 3.7550 GROUND 20-5690
Standard Flange – SF
Rough Bore Diameter
3/4"
3/4"
1 1/4"
1 1/4"
1 1/4"
1 1/4"
Max Bore & Key
1 11/16" x
3/8"
1 7/8" x
1/2"
2 7/16" x
5/8"
3" x 3/4"
4" x 1"
4" x 1"
Number of Bolts
4
4
4
8
8
12
Thread Size
3/8"-24
7/16"-20
1/2"-20
3/8"-24
3/8"-24
7/16"-20
Bolt Circle
3 1/8"
3 3/4"
4 3/4"
6 1/8"
7 1/4"
7 1/4"
Pilot Diameter
2 3/8"
2 3/4"
3 3/4"
6 5/8"
7 3/4"
7 3/4"
Outside Diameter
3 7/8"
4 9/16"
5 7/8"
6 7/8"
8"
8"
Overall Length
2"
2"
2 1/2"
3 1/2"
4"
4"
Special Large Flange – SLF
Rough Bore Diameter
1 3/8"
1 3/4"
2 3/8"
3"
3 1/2"
3 1/2"
Max Bore & Key
2 3/8" x
5/8"
3" x 3/4"
3 3/4" x 1"
4 1/2" x 1"
5 1/2" x 1
1/4"
5 1/2" x 1
1/4"
Number of Bolts
4
4
4
8
8
12
Thread Size
3/8"-24
7/16"-20
1/2"-20
3/8"-24
3/8"-24
7/16"-20
Bolt Circle
3 1/8"
3 3/4"
4 3/4"
6 1/8"
7 1/4"
7 1/4"
Pilot Diameter
2 3/8"
2 3/4"
3 3/4"
6 5/8"
7 3/4"
7 3/4"
Outside Diameter
3 7/8"
4 9/16"
5 7/8"
6 7/8"
8"
8"
Overall Length
2 1/2"
3"
3 1/2"
5"
6"
6"
Common Standard Flanges
Bore
Key
1310
1350/1410
1480/1550
1610
1710
1810
1″
1/4″
31SF-1.00-25
35SF-1.00-25
1-1/8″
1/4″
31SF-1.12-25
35SF-1.12-25
1-1/4″
1/4″
31SF-1.25-25
35SF-1.25-25
1-1/4″
5/16″
31SF-1.25-31
35SF-1.25-31
1-3/8″
5/16″
31SF-1.37-31
35SF-1.37-31
1-3/8″
3/8″
31SF-1.37-37
35SF-1.37-37
1-7/16″
3/8″
31SF-1.43-37
35SF-1.43-37
1-1/2″
3/8″
31SF-1.50-37
35SF-1.50-37
48SF-1.50-37
1-5/8″
3/8″
31SF-1.62-37
35SF-1.62-37
48SF-1.62-37
1-11/16″
3/8″
31SF-1.68-37
35SF-1.68-37
48SF-1.68-37
1-3/4″
3/8″
31SLF-1.75-37
35SF-1.75-37
48SF-1.75-37
1-3/4″
1/2″
31SLF-1.75-50
35SF-1.75-50
48SF-1.75-50
1-7/8″
3/8″
31SLF-1.87-37
35SF-1.87-37
48SF-1.87-37
1-7/8″
1/2″
31SLF-1.87-50
35SF-1.87-50
48SF-1.87-50
2″
1/2″
31SLF-2.00-50
35SLF-2.00-50
48SF-2.00-50
61SF-2.00-50
71SF-2.00-50
2-1/8″
5/8″
31SLF-2.12-62
35SLF-2.12-62
48SF-2.12-62
61SF-2.12-62
71SF-2.12-62
2-1/4″
1/2″
31SLF-2.25-50
35SLF-2.25-50
48SF-2.25-50
61SF-2.25-50
71SF-2.25-50
2-1/4″
5/8″
31SLF-2.25-62
35SLF-2.25-62
48SF-2.25-62
61SF-2.25-62
71SF-2.25-62
2-3/8″
5/8″
31SLF-2.37-62
35SLF-2.37-62
48SF-2.37-62
61SF-2.37-62
71SF-2.37-62
2-7/16″
5/8″
35SLF-2.43-62
48SLF-2.43-62
61SF-2.43-62
71SF-2.43-62
81SF-2.43-62
2-1/2″
5/8″
35SLF-2.50-62
48SLF-2.50-62
61SF-2.50-62
71SF-2.50-62
81SF-2.50-62
2-3/4″
5/8″
35SLF-2.75-62
48SLF-2.75-62
61SF-2.75-62
71SF-2.75-62
81SF-2.75-62
2-15/16″
3/4″
48SLF-2.93-75
61SF-2.93-75
71SF-2.93-75
81SF-2.93-75
3″
3/4″
48SLF-3.00-75
61SLF-3.00-75
71SF-3.00-75
81SF-3.00-75
3-1/2″
7/8″
48SLF-3.50-87
61SLF-3.50-87
71SF-3.50-87
81SF-3.50-87
3-15/16″
1″
61SLF-3.93-1
71SF-3.93-1
81SF-3.93-1
4″
1″
61SLF-4.00-1
71SF-4.00-1
81SF-4.00-1