Three point hitches: Difference between revisions
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=Approaches= | =Approaches= | ||
==Size categories== | |||
[[File:Cat I and II ball closeup.jpg|thumb|Adjustable three-point ball on lift arm. Ball may be rotated to fit either Category I or II implements]] | |||
[[File:Heckhubwerk mit Fanghaken Cat3, Case IH Puma 225 CVX.jpg|thumb|Rear three-point hitch of a Case IH tractor with implement attached by the drawbar]] | |||
There are five different hitch sizes, called categories. The higher category hitches have sturdier lift arms and larger connector pins.{{r|TractorData}} | |||
{| class="wikitable" border="1" | |||
|- | |||
! style="text-align: left; padding-left: 1em; padding-right: 1em;" | Category | |||
! style="text-align: left; padding-left: 1em; padding-right: 3em;" | Tractor power | |||
! style="text-align: left; padding-left: 1em; padding-right: 3em;" | Top link pin diameter* | |||
! style="text-align: left; padding-left: 1em; padding-right: 3em;" | Lift arm pin diameter | |||
! style="text-align: left; padding-left: 1em; padding-right: 3em;" | Lower hitch spacing | |||
|- | |||
| style="text-align: center;" | 0 | |||
| style="padding-left: 1em;" | Up to {{convert|20|hp|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|5/8|in|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|5/8|in|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|20|in|abbr=on}} | |||
|- | |||
| style="text-align: center;" | 1 | |||
| style="padding-left: 1em;" | {{convert|20|to|45|hp|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|3/4|in|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|7/8|in|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|28|in|abbr=on}} | |||
|- | |||
| style="text-align: center;" | 2 | |||
| style="padding-left: 1em;" | {{convert|40|to|100|hp|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|1|in|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|1+1/8|in|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|34|in|abbr=on}} | |||
|- | |||
| style="text-align: center;" | 3 | |||
| style="padding-left: 1em;" | {{convert|80|to|225|hp|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|1+1/4|in|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|1+7/16|in|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|40|in|abbr=on}} | |||
|- | |||
| style="text-align: center;" | 4 | |||
| style="padding-left: 1em;" | More than {{convert|180|hp|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|1+3/4|in|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|2|in|abbr=on}} | |||
| style="padding-left: 1em;" | {{convert|48|in|abbr=on}} | |||
|} | |||
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. | |||
:<nowiki>*</nowiki> refers to implement end; tractor end not specified | |||
=References= | =References= | ||
* [https://en.wikipedia.org/wiki/Three-point_hitch Wikipedia: Three-point hitch] | * [https://en.wikipedia.org/wiki/Three-point_hitch Wikipedia: Three-point hitch] | ||
Revision as of 17:20, 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 Template:Convert | Template:Convert | Template:Convert | Template:Convert |
| 1 | Template:Convert | Template:Convert | Template:Convert | Template:Convert |
| 2 | Template:Convert | Template:Convert | Template:Convert | Template:Convert |
| 3 | Template:Convert | Template:Convert | Template:Convert | Template:Convert |
| 4 | More than Template:Convert | Template:Convert | Template:Convert | Template:Convert |
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
