Three point hitches: Difference between revisions
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| style="text-align: center;" | 0 | | style="text-align: center;" | 0 | ||
| style="padding-left: 1em;" | Up to | | style="padding-left: 1em;" | Up to 20hp | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 5/8 in | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 5/8 in | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 20 in | ||
|- | |- | ||
| style="text-align: center;" | 1 | | style="text-align: center;" | 1 | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 20 to 45hp | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 3/4 in | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 7/8 in | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 28 in | ||
|- | |- | ||
| style="text-align: center;" | 2 | | style="text-align: center;" | 2 | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 40 to 100hp | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 1 in | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 1+1/8 in | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 34 in | ||
|- | |- | ||
| style="text-align: center;" | 3 | | style="text-align: center;" | 3 | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 80 to 225hp | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 1+1/4 in | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 1+7/16 in | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 40 in | ||
|- | |- | ||
| style="text-align: center;" | 4 | | style="text-align: center;" | 4 | ||
| style="padding-left: 1em;" | More than | | style="padding-left: 1em;" | More than 180hp | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 1+3/4 in | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 2 in | ||
| style="padding-left: 1em;" | | style="padding-left: 1em;" | 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. | 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. | ||
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.Template:R
| 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
