Well as Raptors are quite expensive, there control magnet (the top magnet over the actuator on the head assembly) are so strong, that it takes 2 people to remove. Also with the smaller patters, and the size of the drive, it will have too many heads and a head swap is almost never going to work, so you're gonna want to try a live board swap, or replace the PCB board you will also need to swap the rom chip on the PCB board from the old drive to the working board, this will take some soldering. The other likely problem with you're Raptor is that there is damage in the SA (service area) of the drive. This area contains information such as the Drive model number, P-List, G-List, SMART test, servo information, ect. If this is the case, a live board swap will be necessary. Unfortunately this will be difficult to do, and doesn't work that often. The concept is simple: match a drive's board with another board. Put the working drive in a computer and boot it into windows. Now spin the drive down, at one point I found a program to do that, or you can set the power options to power down the HDDs in windows after 3 mins, then walk away. Then, remove the board from the good drive without disconnecting it from the computer, and put it on the bad drive. Then attempt to access the disk. This has maybe a 20% success rate or less, but its worth a shot. Also, if you're willing to open the drive you can look for damage to the platters on the top platter or the filter inside.
Images of head crashes:
Link 1
Link 2
Link 3
If it looks like this, you're screwed. If the filter is silver, you're screwed, you've found you're data, its in the filter. Once you have a head crash, you're not getting data. The data is stored on the platter, and if the platter is destoried, then the data is no longer there to recover. In rare cases you can, with the right imaging equipment (about $3500) and 8-10 hard drives, maybe less you can get SOME data back, but more often than not its not worth it.
Good Luck!