Are there separate body-part damage modifiers for Team Fortress 2

Info From Wiki.

Hope this helps

             Melee Weapons  
Name                              Damage    
                         Point Blank    Critical  

Bat                      24-46,          105  
Sandman                  24-46,          105  
(Baseball)               15,              45  
Shovel                   43-87,          195  
Equalizer                   See Note Below   
Fire axe                 43-87,          195  
Axtinguisher             23-43,          195  
Homewrecker              42-55,          146  
Bottle                   43-87,          195  
Pain train               59-72,          195  
Eyelander                43-87,          195  
Scotsman's skullcutter   78,             234  
Fists                    43-87,          195  
K.G.B.                   43-87,          195   
Wrench                   43-87,          195  
Bonesaw                  43-87,          195  
Übersaw                  43-87,          195  
Kukri                    43-87,          195  
Tribalman's shiv         38-47,          127  
Knife                    28-54,          120  

Note on Equalizer: The damage done scales inversely with health. Approximately 113.7 − 0.405x, where x is the amount of health the player currently has, with a minimum of 33 when the player is at or above 200 health, and a maximum of 113 (before random damage and Critical hits). It should also be noted the Equalizer is the weakest melee weapon when Soldier has max health, and the strongest next to Spy's Backstab when Soldier is low.

For the Range of the weapons, I couldn't find weapon-specific range, the same Wiki states:

The Eyelander's melee range is approximately 37% more than the Bottle and other melee weapons. The same is true for the Scotsman's skullcutter.

Damage spread refers to the fact that a weapon has a spread, or range, of damage that it can deal on any given hit. By default, weapons generally have a +/-10% damage spread.

So if a weapon has 100 base damage, it might do as little as 90 (10% less than base) or as much as 110 damage (10% more than base) on hit. This amount of damage dealt is simply a random value from within the "spread".

Originally, the spread was +/-25%, but Valve eventually reduced it to only +/-10%.

Note that this isn't the only thing that affects weapon damage, there is also a damage falloff based on range for most weapons (they do less damage at greater distance).

Some servers disable damage spread because they think it makes the game more "skill-based" and more fair, since damage dealt is more consistent. This is similar to the argument used for disabling critical hits.