Preparing Reel For Grinding - Toro Reelmaster 3100-D Service Manual

Preparing Reel for Grinding

Three (3) types of reel designs are used in Reelmaster
cutting units: scalloped radial reel, tapered radial reel
and tapered forward swept reel (Fig. 41). The radial reel
designs have blades that are placed in line with the cen-
ter of the reel shaft. The rear of the blades either have
a scalloped relief or a tapered relief. The forward swept
reel have blades that have a slight forward slant. The
rear of the forward swept reel blades have a tapered re-
lief. Before grinding a reel, identify the type of reel design
to make sure that grinding is correctly done.
Before grinding a cutting reel, make sure that all cutting
unit components are in good condition. Depending on
type of grinder used, faulty cutting unit components can
affect grinding results. When grinding, be careful to not
overheat the cutting reel blades. Remove small
amounts of material with each pass of the grinder.
Follow reel grinder manufacturer's instructions to grind
cutting reel to Toro specifications (see Reel Grinding
Specifications chart below). Additional reel grinding in-
formation can be found in your Cutting Unit Operator's
Manual. An additional resource is the Toro Basics Se-
ries Training Book, Reel Mower Basics (part no.
09168SL) found on the Service Reference Set available
from your Authorized Toro Distributor.
Reel Grinding Specifications
Reel Diameter (New)
Service Limit - Reel Diameter
Reel Shaft Diameter (OD)
Reel Diameter Taper (Fig. 42)
Blade Land Width
Blade Relief Angle
Relief grind the reel blades to the minimum blade land
width if the reel blade land width exceeds the service lim-
it. Spin grind the reel to restore its cylindrical shape.
NOTE: Spin grind the reel and establish the specified
blade land width after relief grinding.
After grinding the reel and/or bedknife, adjust the cutting
unit (see Cutting Unit Operator's Manual). Check the
reel to bedknife contact again after cutting two (2) fair-
ways. During this initial use, any burrs will be removed
from reel and bedknife which may create improper reel
to bedknife clearance and thus accelerate wear. This
practice of re−checking the reel to bedknife contact after
grinding will extend the longevity of the sharpness of the
edge of the reel and the bedknife.
DPA Cutting Units
7.060 in
(179.3 mm)
6.600 in
(168 mm)
1.313 in (33.3 mm)
0.001 in (0.025 mm)
Service Limit: 0.010 in (0.25 mm)
0.050 to 0.060 in (1.3 to 1.8 mm)
Service Limit: .120 in (3.0 mm)
o o
30 +/− 5
SCALLOPED RADIAL REEL
TAPERED RADIAL REEL
TAPERED FORWARD SWEPT REEL
1. Blade land width
D1
Reel Diameter Taper = D1 − D2
Page 8 − 36
2
2
2
Figure 41
2. Blade relief angle
Figure 42
Reelmaster 3100−D
1
1
1
D2