This will be a bit of a ramble and little disjointed at times but hopefully I can help share what I know about these winches.
First thing you need to know is who this guy is
This is Tom Telford and he was the godfather of many of the products we now take for granted in the offroad world with a career at Warn that spanned from the 70s to the early 2000s. He had his hands in everything from winch and drivetrain products (both OEM and aftermarket) and was the driving force behind the Warn Axle program that included the Jeep hub conversions and full floater kits. He was instrumental in bringing the three stage planetary winch to market for Warn in the mid 80s and was the designer of the cone brake that is still used in winches today.
The term Mid Frame refers to winches larger than the utility lines warn offers but smaller than the large frame winches. Typically they have a 4.5 inch by 10 inch bolt pattern (there are exceptions like the M6000SDP and the 9.0Rc) and "foot down" mounting position although many models can be mounted "foot forward" as well. They have been produced over the years in capacities ranging from 4500 up to 12000 pounds. A few examples not including the value winches (ie Magnum/Tabor and VR):
M4500
M5000
M6000
M6000SDP
M8000
x8000I
XD9000
XD9000i
hs9500
hs9500i
9.0Rc
9.5XP
9.5ti
9.5cti
12.0Endurance
The Powerplant (compressor) winch and Zeon fall in here but probably deserve there own threads.
Layout of the majority of Midframes are pretty basic, a drum, two drum supports with the motor on one and the gear train on the opposite. Drivetrain consists of three planetary gears, a sliding ring gear for free spooling, and a brake. The electrical side of things consist of a motor, control pack and a pendant (remote). Motors varied over the years from 1.9 hp permanent magnet to the now famous 6 hp XP notor. Control packs are basic consisting of solenoids or a contactor. Lubrication from the early years up to a few years ago was Aeroshell #17 but Shell discontinued it so Warn now specs Philips Moly Low Temp #1.
First thing you need to know is who this guy is
This is Tom Telford and he was the godfather of many of the products we now take for granted in the offroad world with a career at Warn that spanned from the 70s to the early 2000s. He had his hands in everything from winch and drivetrain products (both OEM and aftermarket) and was the driving force behind the Warn Axle program that included the Jeep hub conversions and full floater kits. He was instrumental in bringing the three stage planetary winch to market for Warn in the mid 80s and was the designer of the cone brake that is still used in winches today.
The term Mid Frame refers to winches larger than the utility lines warn offers but smaller than the large frame winches. Typically they have a 4.5 inch by 10 inch bolt pattern (there are exceptions like the M6000SDP and the 9.0Rc) and "foot down" mounting position although many models can be mounted "foot forward" as well. They have been produced over the years in capacities ranging from 4500 up to 12000 pounds. A few examples not including the value winches (ie Magnum/Tabor and VR):
M4500
M5000
M6000
M6000SDP
M8000
x8000I
XD9000
XD9000i
hs9500
hs9500i
9.0Rc
9.5XP
9.5ti
9.5cti
12.0Endurance
The Powerplant (compressor) winch and Zeon fall in here but probably deserve there own threads.
Layout of the majority of Midframes are pretty basic, a drum, two drum supports with the motor on one and the gear train on the opposite. Drivetrain consists of three planetary gears, a sliding ring gear for free spooling, and a brake. The electrical side of things consist of a motor, control pack and a pendant (remote). Motors varied over the years from 1.9 hp permanent magnet to the now famous 6 hp XP notor. Control packs are basic consisting of solenoids or a contactor. Lubrication from the early years up to a few years ago was Aeroshell #17 but Shell discontinued it so Warn now specs Philips Moly Low Temp #1.