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Driveshafts with Flanges

 

When it comes to flanges in a driveline, there are a few things to consider like sizing, application & fitment.

First, identify what type of flange we are dealing with.

 

How To Identify Universal Joints

There are many different series of u-joints.
MDL Supplies a wide selection of U-joints for many different applications.
They vary in Series and in Size
If there is a u-joint that we do not stock in our inventory, we can easily order the part for you, along with the rest of your order.

The first thing to identify is whether the U-joint has  inside  or  outside  snap rings.

 

After identifying the configuration of the snap rings, it’s time to get some dimensions.
You will need to find the diameter of one of your u-joint caps.
This applies to both u-joints with inside and outside snap rings.

The next dimension that you need to find, will vary between the two types of u-joint configurations.

 

 

 

Outside snap rings

 

For U-joints with outside snap rings, you will need to measure from the edge of one u-joint cap straight across to the edge of the other u-joint cap.

 

 

 

 

 

 

 

Inside snap rings

 

For u-joints with inside snap rings, you will see a groove on all the u-joint caps.
You will need to measure from the outside edge of one snap ring groove straight across to the outside edge of the other snap ring groove.

 

 

 

With these dimensions, it will be easy to identify what series of U-joints you have.

 

 

Another way to identify a u-joint is by properly measuring the pinion yoke.

The diagrams below will show you which measurements to take to do so.

                           

SIDE VIEW OF INSIDE SNAP RING YOKE                                TOP VIEW OF PINION YOKE

 

                             

SIDE VIEW OF PINION YOKE WITH TABS                        TOP VIEW OF PINION YOKE WITH TABS

 

 

OUTSIDE SNAP RING
SERIES	WIDTH (F)	CAP DAIMETER (G)
1310	3 7/32” = 3.219	1 1/16” = 1.063 / 1.125
1330	3 5/8” = 3.625	1 1/16” = 1.063
1350	3 5/8” = 3.625	1 3/16” = 1.188

 

 

INSIDE SNAP RING
SERIES	WIDTH (F)	CAP DAIMETER (G)
1310	3 7/32” = 3.219	1 1/16” = 1.063 / 1.125
1330	3 5/8” = 3.625	1 1/16” = 1.063
1350	3 5/8” = 3.625	1 3/16” = 1.188

 

 

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Do you have a Male or Female Flange?

 

 

1. It is important to know are the Holes Threaded or just drilled ?
2. Is the hole pattern Square or Rectangular ?

 

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Other helpful information is outlined below.

• Measure Dimension ‘A’ from Diagram below

• Repeat this step for dimension ‘B’

 

 

 

A.   Bolt Hole Diameter

B.   Bolt Circle Diameter

 

 

 

 

Register Diameter – SB 2”

 

Standard 4-bolt flanges

Bolt Circle Diameter                        Pilot                    UJ Series

4.25      Sq          F                              2.0                          1310                                      

4.25      Sq          F                              2.0                          1330                                      

3.5         Sq         F                              2.0                          1310                      

3.5         Sq         F                              2.0                          1330                                      

3.125     Rec      M                             2.375                       1310                                      

 

 

6 and 8-bolt flanges

Bolt Circle                                   Bolt Diameter           UJ Series

  3.7 x 6                                                .425                        1350                     

  3.47 x 8                                              .425                        1350                     

  4.33 x 6                                              .500                        1350  

Pilot Choices:  2.0, 2.375, 2.685, 2.75,  2.94

Bolt Circle Dia:  2.75, 3.5, 4.25, 4.75

 

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…………………………Pinion Companion Flange Example