leonz
Super Member
The rotary cutter and flailmower function with
the tractors power take off to provide the
torque and speed with a one to one gearbox
for the specific mowing implement with the
mower increasing the blade tip speed with a
V belt drive using smaller diameter V-belt pulleys
in the case of rear mounted rotary finish mower
and belly mowers; where a belt driven flail mower
uses a V belt drive pulley which is smaller than the
driven pulley to slow down the driven pulley which
is attached to the flail mower rotor.
A rotary cutter or flailmower mounted on the front
of a tractor will take its power from the front crank shaft
harmonic balancer and possibly a reversing gear box
depending strictly upon the implements normal rotation.
In the case of the very large mid mount belly mowers where
the V-belt is powered using the rear P.T.O., stub shaft like our
old 1969-70 IH Cub LowBoy(original) with a 4 cyclinder water
cooled IH engine which used a single rear P.T.O., B type pulley
which directed the belt to a pair of pulleys bolted to a frame
under the tractor axle which in turn routed the same V belt to the
center pulley of the 6 foot belly mower of the IH cub Low Boy
which in turn powered the separate secondary driven belt that
rotated the mowers left and right mower spindles using a spring
tensioned snubber pulley which pulled against the V belts flat side.
The much older IH Cub Lowboys were higher and had an offset
operators station and used the Mott Flail Mower as a belly mower
in some models.
The older Mott flail type belly mowers and larger mid mounted
belly mowers used a V belt and pulley with mounting frame and
pulley pairs routed from the rear P.T.O., to secure the B size V-belt
to route it to the V-belt pulley on the flailmowers exterior to rotate
the pulley and in turn the flail mower rotor to cut the grass.
A bat wing mower uses a center mounted right angle one to one
gear box to transmit this power to the second and or third wing
gear boxes to mow at the 540 R.P.M., speed using telescoping
P.T.O., shafts that are positioned diagonally to the lower left and
or right in the case of a 3 section bat wing mower with enough of
a diagonal angle to allow placement of the gearbox(es)in order to
allow the wing(s) to fold for transport in a road near legal or legal
transport width or to allow repositioning at work to bypass substantial
obstacles which must be driven around to continue mowing with the left
and or right wings lowered to continue work.
The rotary finish mower and the rotary brush cutters cutting blades function
with what is referred to as "blade tip speed" to mow the grass or brush with a
high speed of horizontal rotation. This blade tip speed can approach or exceed
150 miles per hour which is 220 feet per second.
Using the information provided by BEFCO for thier line of Hurricane flail mowers
the BEFCO Hurricane flail mowers use a 540 R.P.M., P.T.O., speed delivered to
the right angle gear box which delivers the rotary speed to the smaller speed
up drive pulley with a shaft drive supported by a universal joint in some cases
and an open bearing which rotates a small V belt pulley which in turn rotates
the larger rotor pulley using V-belt(s) provides the necessary slower rotor speed
via the driven pulley of 2,278 R.P.M., at the 540 R.P.M., P.T.O., engine speed.
This in turn provides a blade tip speed of 8,858 feet per minute which is 220
feet per second(rounded) to mow with the "Verticut method of mowing" with knives
attached/mounted to individual shackles which are attached/mounted to the flail
mower rotor.
This high speed of rotation and blade tip speed is due to thesmall diameter of the
Befco flail mower rotor in the example and other flail mower brands rotors as well
which is aided by the small grass slicer knive wieght allowing a greater speed up
of the cutting edge of the grass slicer due to the lower wieght of the
individual grass slicer on the flail mower rotor.
Some past and present flail mower designs allow the switching of the V belt
drive and driven pulley position to increase the flail mower rotor speed to allow
them to acheive even an fasterspeed of rotation (blade tip speed) around the
horizontal axis of the flail mower rotor to do a more efficient shredding job of
the grass clippings.
The flail mowing rotor speed of the "BEFCO Hurricane" flail mower mounted implement
using the "Verticut Method" is the same speed as a typical rotary cutter at 540 R.P.M.,
but presents more cutting edge per foot of cut as compared to a rotary cutter or the rotary
rear finish mower which uses half of the mowers cutting width at any time due to the single
cutting edge exposed at any time during during mowing.
Other flail mowers have a much higher blade tip speed for slicing brush without exchanging the
V-belt pulley position but I have not discussed them here.
_________________________________________________________________
Please tell my cows to come home;
they have to clean up the mess they
left after the toga, beer, and pizza party
last night and pick up all their beer cans,
pizza boxes, and dirty togas they left by the pool.
AND clean the pool!!!!!
Oh and by the way you can tell them I burned their
movie stash and they can forget about anymore allowance!!!!
I will not clean up your mess again!!!!!
---------------------------------------------
A little fun on a wet, wet day:thumbsup:
the tractors power take off to provide the
torque and speed with a one to one gearbox
for the specific mowing implement with the
mower increasing the blade tip speed with a
V belt drive using smaller diameter V-belt pulleys
in the case of rear mounted rotary finish mower
and belly mowers; where a belt driven flail mower
uses a V belt drive pulley which is smaller than the
driven pulley to slow down the driven pulley which
is attached to the flail mower rotor.
A rotary cutter or flailmower mounted on the front
of a tractor will take its power from the front crank shaft
harmonic balancer and possibly a reversing gear box
depending strictly upon the implements normal rotation.
In the case of the very large mid mount belly mowers where
the V-belt is powered using the rear P.T.O., stub shaft like our
old 1969-70 IH Cub LowBoy(original) with a 4 cyclinder water
cooled IH engine which used a single rear P.T.O., B type pulley
which directed the belt to a pair of pulleys bolted to a frame
under the tractor axle which in turn routed the same V belt to the
center pulley of the 6 foot belly mower of the IH cub Low Boy
which in turn powered the separate secondary driven belt that
rotated the mowers left and right mower spindles using a spring
tensioned snubber pulley which pulled against the V belts flat side.
The much older IH Cub Lowboys were higher and had an offset
operators station and used the Mott Flail Mower as a belly mower
in some models.
The older Mott flail type belly mowers and larger mid mounted
belly mowers used a V belt and pulley with mounting frame and
pulley pairs routed from the rear P.T.O., to secure the B size V-belt
to route it to the V-belt pulley on the flailmowers exterior to rotate
the pulley and in turn the flail mower rotor to cut the grass.
A bat wing mower uses a center mounted right angle one to one
gear box to transmit this power to the second and or third wing
gear boxes to mow at the 540 R.P.M., speed using telescoping
P.T.O., shafts that are positioned diagonally to the lower left and
or right in the case of a 3 section bat wing mower with enough of
a diagonal angle to allow placement of the gearbox(es)in order to
allow the wing(s) to fold for transport in a road near legal or legal
transport width or to allow repositioning at work to bypass substantial
obstacles which must be driven around to continue mowing with the left
and or right wings lowered to continue work.
The rotary finish mower and the rotary brush cutters cutting blades function
with what is referred to as "blade tip speed" to mow the grass or brush with a
high speed of horizontal rotation. This blade tip speed can approach or exceed
150 miles per hour which is 220 feet per second.
Using the information provided by BEFCO for thier line of Hurricane flail mowers
the BEFCO Hurricane flail mowers use a 540 R.P.M., P.T.O., speed delivered to
the right angle gear box which delivers the rotary speed to the smaller speed
up drive pulley with a shaft drive supported by a universal joint in some cases
and an open bearing which rotates a small V belt pulley which in turn rotates
the larger rotor pulley using V-belt(s) provides the necessary slower rotor speed
via the driven pulley of 2,278 R.P.M., at the 540 R.P.M., P.T.O., engine speed.
This in turn provides a blade tip speed of 8,858 feet per minute which is 220
feet per second(rounded) to mow with the "Verticut method of mowing" with knives
attached/mounted to individual shackles which are attached/mounted to the flail
mower rotor.
This high speed of rotation and blade tip speed is due to thesmall diameter of the
Befco flail mower rotor in the example and other flail mower brands rotors as well
which is aided by the small grass slicer knive wieght allowing a greater speed up
of the cutting edge of the grass slicer due to the lower wieght of the
individual grass slicer on the flail mower rotor.
Some past and present flail mower designs allow the switching of the V belt
drive and driven pulley position to increase the flail mower rotor speed to allow
them to acheive even an fasterspeed of rotation (blade tip speed) around the
horizontal axis of the flail mower rotor to do a more efficient shredding job of
the grass clippings.
The flail mowing rotor speed of the "BEFCO Hurricane" flail mower mounted implement
using the "Verticut Method" is the same speed as a typical rotary cutter at 540 R.P.M.,
but presents more cutting edge per foot of cut as compared to a rotary cutter or the rotary
rear finish mower which uses half of the mowers cutting width at any time due to the single
cutting edge exposed at any time during during mowing.
Other flail mowers have a much higher blade tip speed for slicing brush without exchanging the
V-belt pulley position but I have not discussed them here.
_________________________________________________________________
Please tell my cows to come home;
they have to clean up the mess they
left after the toga, beer, and pizza party
last night and pick up all their beer cans,
pizza boxes, and dirty togas they left by the pool.
AND clean the pool!!!!!
Oh and by the way you can tell them I burned their
movie stash and they can forget about anymore allowance!!!!
I will not clean up your mess again!!!!!
---------------------------------------------
A little fun on a wet, wet day:thumbsup:
Last edited:
