Bernhard BLADE RITE 1750 Bedienungsanleitung
BLADE RITE 1750 MANUAL
BLADE RITE 1750
Please read this manual carefully before using the Blade Rite.
This manual should be kept in a safe place so that it can be used for future reference.
BR1750 Blade Relief Grinder
User’s Guide &
Instruction Manual
2
BLADE RITE 1750 MANUAL
© Bernhard and Company Limited
BLADE RITE
Contents
BERNHARD AND COMPANY LTD
Bilton Road • Rugby • England • CV22 7DT
Tel +44 1788 811600 • Fax +44 1788 812640
Email: info@bernhard.co.uk
USA Toll Free 1-888 GRIND IT (
1-888 474 6348)
BR1750 Blade Relief Grinder
You are now the owner/operator of a Bernhard’s Blade Rite 1750 which, if cared for
and operated correctly, will give you years of good service.
This manual will enable you to obtain the best results from your Blade RIte so
please read it thoroughly before using your machine.
If you have any service or operational problems contact your distributor,
or phone our
Technical Helpline (USA only) – 1-888 474 6348
or
Bernhard and Company Ltd, England – (+44) 1788 811600
or email
use the technical support feedback form on our web site
www.expressdual.com or www.bernhard.co.uk
Safety 3
Assembling the Blade Rite 4
Reel Grinding 5
Part Lists and Exploded Diagrams 10
BR1750_02/2007
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BLADE RITE 1750 MANUAL
© Bernhard and Company Limited
1.1 This machine is designed to perform the operation of single blade/relief grinding on reel
mower cutting units.
The machine should not be used for any other purposes other than those for which it was
designed.
1.2 This machine should be installed, operated and maintained by only competent personnel.
1.3 Before carrying out any work on the machine, other than actual grinding, isolate the
electrical power supply.
1.4 Always operate the machine with the spark guard in place. Always wear adequate eye, ear
and breathing protection.
1.5 Only use recommended grinding wheels specically designed for this type of grinding unit.
1.6 Never leave rags or tools on the machine, or allow combustible materials to accumulate
around the machine.
1.7 Always ensure that the unit to be ground is securely mounted on the machine with no
loose components.
1.8 Always ensure that all electrical connections are sound, with cables safely routed.
Stay alert. Wear suitable clothing. Never operate the machine when tired or under the
inuence of alcohol or drugs.
1. Safety
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BLADE RITE 1750 MANUAL
© Bernhard and Company Limited
2. Assembling the Blade Rite 1750
2.1 You should receive this machine partly assembled.
2.2 Bolt the two support uprights to the top of the main chassis with the M12 hex bolts
provided. Do not fully tighten at this stage.
2.3 Slide the suspension and stop rod assemblies over the upper support rail.
Bolt the support bar between the support uprights tting the lift over guard at the same
time.
Guard Guard
Spacer
Support Upright
Upper Stop
Adjustable Lower Stop Upper Support Rail M12 Hex Bolt
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BLADE RITE 1750 MANUAL
© Bernhard and Company Limited
3.1 Setting up for Blade Thinning (Relief grinding)
Note 1: Blade thinning (Relief grinding) is best carried out after the reel has been spun
ground to a perfect cylinder.
Note 2: Occasionally it may be necessary to remove the front roller and/or scraper from
some units to gain better access.
3.2 The mowing unit should sit with it’s rear roller in ‘vee’ support of the mower support
carriage [1] (g. 3.2.1.)
The hook/rope from the ratchet pulley block [2] should be attached to/around a convenient
point on the front of the mowing unit.
Raise the front of the unit whist simultaneously pulling the rope of the pulley block (g.
3.2.1.).
Slide the support carriage forward, complete with mowing unit, and set the unit into a
suitable position for grinding.
Tighten the 8mm Allen screws at the sides of the support carriage.
Rigidly secure the front of the mowing unit with the suspension rods by:
a) bolting directly to a convenient point on the mower frame, or (g.3.2.2.).
b) clamping to a suitable point with the suspension rod clamps.(g 3.2.3.).
1
3. Reel Grinding
Fig. 3.2
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BLADE RITE 1750 MANUAL
© Bernhard and Company Limited
Note: The mounting system enables a wide range of
movement so that reels of all types and sizes
can be positioned to achieve the desired angle of
relief grind.
3.3 The grinding carriage should now be moved along the guide rails so that the grinding disc
can be adjusted close to the reel blades.
The grinding head can be adjusted up and down by loosening the locking ring [3] and
raising/rotating the head about its rear pivot by turning the adjuster knob [3A].
3. Reel Grinding (Continued)
Fig. 3.2.1
2
1
Fig. 3.2.2
Fig. 3.2.3
3A
3
Fig. 3.3
4
6
5
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BLADE RITE 1750 MANUAL
© Bernhard and Company Limited
(Cont.) It can be adjusted in and out by means of the feed handwhee [4].
The blade rest (support nger) [5] should be positioned as close to the grinding wheel as
possible, then feed the grinding head in so that one end of one blade is supported by the
rest with the grinding wheel hardly touching the blade (Very light contact).
Traverse the grinding carriage to the other end of the blade, rotating the reel with the other
hand to keep the blade supported on the rest. Contact between blade and grinding wheel
should be even along the blade length. Adjustment to achieve this can be made using the
handwheels on the left and right hand guide rail side arms.
(Generally raising a side arm, turn handwheel clockwise, will bring the blade closer to the
grinding wheel at that end, whilst lowering a side arm, turn handwheel counter clockwise
will have the opposite result).
Note: It may be necessary to re-adjust the position of the mower, to obtain the desired
relationship between grinding wheel and blade, in order to achieve the desired angle of
relief grind, but with experience this positioning becomes quick and easy.
3.4 Set the left-hand traverse stop collar on the guide rail so that the grinding wheel covers
the left-hand end of the reel blade. The reel blade stays on the blade rest whilst the index
nger [6] springs up above the blade ready for traverse towards the right.
3.5 Set the right hand traverse stop collar on the guide rail so that the grinding wheel and
blade rest (support nger just clear the end of the reel blade without coming into contact
with the mower’ side plate or frame). The reel rotates forwards and the next reel blade
pushes the index nger down aligning the blade so that it will run onto the blade rest when
traverse is to the left.
3.6 Adjust the “low” position of the index nger so that it leads the reel blades smoothly onto
the blade rest (support nger) The weight of the reel blade should not be at this index
nger during right to left traverse; Adjust the “high” position so that the index nger is just
clear (above) blades for r/h traverse AND is caught by the next blade when the reel rotates
at the index position (r/h traverse stop); If necessary the index nger can be adjusted in
and out of it’s mounting block (It is locked in place by a small grub screw).
3. Reel Grinding (Continued)
View from Operator Position Support Finger M6 Wing Knob
Index Finger
Support
Finger
Set Index Finger
“High” Position
Set Index Finger
“Low” Position
Support
Finger
Reel control motor
moves reel so
that blade collects
index nger
Index nger is set
‘Low’ position so
that blade is led
smoothly onto
support nger
View from Operator Position
At Left-hand Traverse
Reverse Position:
Index Finger springs up
Index Finger
Roller
(High position)
As grinding head
traverses left to right,
ideal position of index
‘High’ nger leaves a
small clearence above
reel blade
Stone stays on
end of reel blade
Index Finger
Roller
(Low position)
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BLADE RITE 1750 MANUAL
© Bernhard and Company Limited
3.7 Connect reel drive motor. Loosen the locking lever clamping the support rod position
and the wing knob that locks the motor to the support rod; Rotate the support rod in it’s
mounting and slide the motor up and down until the output shaft aligns with the reel drive.
Connect the “slip clutch” output to the reel with a suitable coupling.
3.8 Select the direction to drive reel down onto blade rest (down from the top) and switch on
the motor.
3.9 Adjust the “slip clutch” so that it just keeps the reel blades onto the nger so that there is
sufcent torque for a smooth index between blades. This is achieved by loosening the
locking ring and by rotating the adjusting collar at the rear of the “slip clutch” (closest to
motor/gearbox) to increase spring compression; Clockwise rotation increases torque,
counter clockwise rotation reduces it.
3.10 Traverse the grinding head, by hand, to the left and right to check that the indexing is
working (remember to pause at the r/h traverse stop to give the reel time for the next blade
to reach the rest)
3.11 Switch on the traverse motor and engage with the lever, to conrm indexing works (The
traverse automatically pauses at each end, longer at the right-hand end to allow time for
indexing). If all is ok, disengage the traverse. Traverse speed may be adjusted by means of
the potentiometer knob on the control panel.
3.12 Mark one blade as a “datum” so that it can be returned to each time.
3.13 Lower the safety guard.
Note: Before actual grinding takes place, ensure that appropriate safety wear is used (see safety
notes in section 1).
3. Reel Grinding (Continued)
Reel Drive Motor
Reel Cutting Unit
Coupling
Slip Clutch
Torque Adjusting Collar
Suspension Rod
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BLADE RITE 1750 MANUAL
© Bernhard and Company Limited
4.1 Switch on the grinding motor and apply a light cut. Traverse the length of the blade
manually without touching the l/h stop or allowing the blade to index. Check that the
width/angle of cut is constant along the blade length. Adjust the side arm handwheels, if
necessary, to achieve this.
4.2 Apply a reasonable cut and engage the traverse.
4.3 Increase the feed as necessary to keep the cut on each blade constant.
4.4 Finish the nal rotation of the reel with a light cut so that grindstone wear does not effect
the relative amount of metal removed from each blade.
4.5 Disengage the traverse and switch off vacuum and grinder, traverse and reel drive motors.
4. Relief Grinding (Blade Thinning)
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BLADE RITE 1750 MANUAL
© Bernhard and Company Limited
5. Parts List
Page
BASE _________________________________________________ 11
CARRIAGE _____________________________________________ 13
MOTOR PLATE AND TRANSMISSION ______________________ 15
ELECTRICAL CABINET __________________________________ 17
CONTROL BOX _________________________________________ 18
GUARD ________________________________________________ 19
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