Three point hitches: Difference between revisions
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=Approaches= | =Approaches= | ||
==Size categories== | ==Size categories== | ||
There are five different hitch sizes, called categories. The higher category hitches have sturdier lift arms and larger connector pins. | |||
There are five different hitch sizes, called categories. The higher category hitches have sturdier lift arms and larger connector pins. | |||
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Revision as of 17:23, 9 May 2021
Project: Three point hitches
| Parts: | Frames, Nuts, Bolts, End caps |
|---|---|
| Techniques: | Tri joints |
Introduction
Challenges
Approaches
Size categories
There are five different hitch sizes, called categories. The higher category hitches have sturdier lift arms and larger connector pins.
| Category | Tractor power | Top link pin diameter* | Lift arm pin diameter | Lower hitch spacing |
|---|---|---|---|---|
| 0 | Up to 20hp | 5/8 in | 5/8 in | 20 in |
| 1 | 20 to 45hp | 3/4 in | 7/8 in | 28 in |
| 2 | 40 to 100hp | 1 in | 1+1/8 in | 34 in |
| 3 | 80 to 225hp | 1+1/4 in | 1+7/16 in | 40 in |
| 4 | More than 180hp | 1+3/4 in | 2 in | 48 in |
There are also variants to the above categories denoted by N, (narrow). These utilize the pin sizes of the listed category, but the width of a category one step lower. The N variations are common in "quick hitches" and allow larger tractors to easily hook onto smaller utility implements.
- * refers to implement end; tractor end not specified
