OVERVIEW - 3/4'' OFFSET PIVOT SETSA set includes one bottom pivot and one top pivot Sets furnished with both wood and metal screws See example below. |
| Model |
Door Type |
Max Wt. |
Top Pivot |
Handed? |
117-1/4
|
Interior |
250 |
180 |
Yes |
117
|
Interior |
300 |
180 |
Yes |
195
|
Exterior or Interior |
450 |
180 |
Yes |
147
|
Exterior or Interior |
600 |
180 |
Yes |
117-1/2
|
Exterior or Interior |
650 |
180 |
Yes |
H147
|
High Traffic Exterior or Interior
Model Discontinued
|
800 |
H180 |
Yes |
L147
|
Lead Lined |
1000 |
L180 |
Yes |
L117
|
Lead Lined |
1750 |
L180 |
Yes |
Example of an offset pivot.
The pivot point (spindle) is offset from the face of the door.
In standard applications the offset is 3/4''.
Some models are also available in 1-1/2'' offset.
Tips from the Pros
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The main advantage of pivot sets over standard butt hinges is the weight of the door is supported by the floor.
Conventional hinges place that weight (stress) on the door frame.
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We get calls all the time about unusual applications. These two are the most common:
Door with Arched Top
The problem exists in that there is no place to install a top pivot.
The most common solution is to install at least 2 intemediate pivots into the edge of the door.
The good news is the intermediates keep the door aligned properly. This greatly reduces the chances of warping.
The bad new is that intermediate pivots are not designed to bear any weight.
While it is true the bottom pivot bears the bulk of the weight, the upper-most intermediate pivot will normally bear some weight.
The trick is to take your time during installation to ensure the pivots points are aligned as perfectly as possible.
Note you must use 3/4'' offset pivots. They do not make intermediate pivots for center hung pivot sets.
Book Case Applications
Feeling confident about your woodworking abilities?
Try making a bookcase that swings out to reveal a hidden passage way. Then get ready for a big bite of humble pie.
Here's the main issue: pivot sets are designed to work with commercial doors. Standard doors are 1-3/4'' thick and 3.0 x 7.0.
A standard book case is typcally much wider and is much heavier (when loaded with books). And here's the killer - much deeper!
An 1-3/4'' thick door is always beveled to ensure it swings freely. Standard bevel is 1/8'' over 2'' in distance.
What happens if your door is 12'' thick? Correct, that's a lot of bevel.
You've also got to choose between center hung and offset hung pivots. Center hung always work better in these applications.
For one, you can place the pivot point much closer to the center of the object. This reduces stress on the pivot point.
Secondly, offset hung pivot sets leave an exposed portion of the hardware. Most people dont' want anything exposed for a book case.
Another suggestion is to search the web for some drawings and examples. They exist. We've seen them.
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U.S. Builder Supply
7801 North Lamar Blvd, D-101
Austin, TX 78752
© 2008 U.S. Builder Supply
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