Grizzly T27697 User guide

MODEL T27697 & T27699

6" & 8" HELICAL

CUTTERHEADS

INSTALLATION INSTRUCTIONS

For questions or help with this product contact Tech Support at [phone] or [e-mail]

These indexable insert helical cutterheads are
designed to replace cutterheads from the follow­ing Grizzly models:

T27697....................................... G0490, G0490X

T27699 .....................................G0604, G0604X

Do NOT modify or alter these cutterheads
to make them fit other makes or models
of jointers for which they aren't designed.
Doing so could result in property damage or
serious personal injury.

The total installation/setup procedure takes
approximately one hour. Read these instructions
thoroughly before beginning. Also, we strongly
recommend replacing the old cutterhead bearings
at the time of installation. The T27699 uses (2)
6004ZZ bearings. The T27697 uses (1) 6204-2RS
bearing and (1) 6205-2RS bearing.

Recommended Tools

Hex Wrench 4, 6mm .................................... 1 EA

Wrench/Socket 10, 13, 17, 19mm ................ 1 EA

Precision Straightedge ...................................... 1

Feeler Gauge Set .............................................. 1

Pair of Heavy Leather Gloves ........................... 1

Safety Glasses (per person) .............................. 1

Pulley Puller ....................................................... 1

Rubber Dead Blow Hammer ............................. 1

Wood Block 12" 4x4 ........................................ 1

Wood Blocks 8" 2x4 ......................................... 2

Shop Rag .......................................................... 1

Degreaser .......................................... As Needed

Flat Piece of Scrap Wood ................................. 1

Inventory (Figure 1)

A. Helical Cutterhead ...................................... 1

B. Torx Drivers T20 ........................................ 2

C. Torx L-Wrenches T20 ................................ 2

D. Indexable Carbide Inserts 15 x 15 x 2.5 .... 5

E. Flat Head Torx Screws T20 M6-1 x 15 ...... 3

Note: Not all pictures in these instructions will

exactly reflect your machine. Some photos are
provided for representation purposes only to help
you better understand the instructions given.

Specifications

T27697

Maximum Width of Cut ..................................... 8"

Cutterhead Diameter ................................. 85mm

Number of Indexable Carbide Inserts ............. 40

Indexable Carbide Insert Size ...15 x 15 x 2.5mm

T27699

Maximum Width of Cut ..................................... 6"

Cutterhead Diameter ................................. 75mm

Number of Indexable Carbide Inserts ............. 30

Indexable Carbide Insert Size ...15 x 15 x 2.5mm

COPYRIGHT © NOVEMBER, 2016 BY GRIZZLY INDUSTRIAL, INC.

WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE

OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.

#MN18219 PRINTED IN CHINA

A

Figure 1.

B

Helical cutterhead inventory.

C

DE

Removing Existing Cutterhead

1. Disconnect machine from power!

7. Remove cap screw and flat washer securing

cutterhead pulley, then remove pulley and
key from cutterhead.

2. Remove jointer fence and cutterhead guard.

3. Remove rabbet extension table, rear cover

and belt guard, then remove V-belt from
pulleys.

4. Loosen infeed and outfeed table locks, then
loosen jam nuts and positive stop bolts locat­ed at back of machine.

Note: When lowering, make sure fence sup-

port does not come in contact with cutterhead
pulley.

5. Lower both beds to make enough room
for cutterhead to come out, as shown in
Figure 2.

—If pulley is difficult to remove, use a pulley

puller (see Accessories, Page 6, if you do
not have a pulley puller).

8. Remove cap screws and lock washers that
secure both bearing blocks, as shown in

Figure 3.

9. Mark side of front bearing block that faces

front of machine (see Figure 3) with tape or a
felt marker to make it easier to re-install bear­ing blocks later.

Mark Here

Figure 2. Example of jointer disassembly Steps

1–5.

6. Remove knives or reverse their mounting

direction so blades face toward cutterhead.

Jointer knives are extremely sharp. You
must remove the jointer knives, or mount
the knives blade side down to avoid the risk
of serious personal injury during the follow­ing steps.

Figure 3.

10. Carefully remove bearing bocks and

Figure 4. Example of cutterhead removed.

Location for removing cap screws and

lock washers on front bearing block.

cutterhead from casting (see Figure 4).

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T27697/T27699 6" & 8" Helical Cutterheads

Note: Your cutterhead may have paper or

metal shims stuck to the bearing block or the
part of the casting where the bearing block
rests. These were included at the factory
when they calibrated your cutterhead even
with the outfeed table. If you see these, care­fully pull them off and set them aside for later
use, or keep them with your cutterhead in the
event that you reinstall it later. Also, mark the
side of the cutterhead where they were used,
so the future install will go smoothly. Your
new cutterhead may or may not need these.

11. Cut a 2x4 into two 8" pieces.

12. Place cutterhead assembly on workbench

or flat surface with pulley side of cutterhead
shaft facing up, then place 2x4 blocks under
rear bearing block, as shown in Figure 5.

Tip: Wrapping tape around blocks can help

hold them together during the next step.

Front

Bearing

Front Bearing

Block

Rear Bearing

Block

Figure 6. Disassembled cutterhead assembly.

Jointer carbide inserts are extremely sharp.
Wear leather gloves to avoid the risk of
serious personal injury during the following
steps.

Rear Bearing

Block

Front Bearing

Block

Figure 5. Removing rear bearing block.

13. Tap top of cutterhead shaft with a rubber

dead blow hammer and a 4x4 block. This
should separate cutterhead from rear bearing
block.

14. Remove front bearing block and bearing from
cutterhead—if it has not already dropped off.

Figure 6 shows disassembled components.

15. Install or replace bearing removed in Step
14 onto front end (shorter shaft) of your

Model T27697/T27699 helical cutterhead,
then press bearing into front bearing block.

16. Stand cutterhead upright between two 8" 2x4
blocks, then use a piece of scrap wood and
a dead blow hammer to seat cutterhead into
bearing blocks, as shown in Figure 7.

Front Bearing

Block

Rear Bearing

Block

T27696/T27699 6" & 8" Helical Cutterheads

Figure 7. Seating rear bearing block onto helical

cutterhead.

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17. With a rag, wipe down part of casting where
bearing blocks will rest to remove sawdust.

18. While keeping bearing blocks pressed against
helical cutterhead, move cutterhead to joint­er. Using mark from Step 9, install cutterhead
so front bearing block is positioned at front
of machine (see Figure 8). Be careful not to
chip carbide inserts on jointer beds.

Front Bearing

Block

21. Using straightedge and feeler gauge set,
inspect cutterhead parallelism with outfeed
table as shown in Figure 10. With straight­edge in position, raise or lower outfeed table
until cutterhead body (not carbide insert) just
touches straightedge.

Straightedge

Outfeed Table

Figure 8. Example of installing helical

cutterhead.

19. Secure bearing blocks with cap screws
and lock washers removed in Step 8 (see

Figure 9).

Figure 9. Example of helical cutterhead installed.

20. Install key on cutterhead keyway, push pul-

ley onto cutterhead shaft, then secure pulley
with cap screw and flat washer removed in
Step 7. Ensure both pulley set screws are
tight.

Figure 10.

22. Move straightedge to other side to determine

if one end of cutterhead body is higher/lower
than the other. (Place feeler gauge between
cutterhead body and straightedge to deter­mine height difference.)

—If cutterhead is even or within 0.004" with

outfeed table from one side to the other,
skip to Step 25.

—If cutterhead is over 0.004" from one side

to the other, go to Step 23.

23. Loosen cap screws securing bearing blocks,
lift helical cutterhead slightly, then place a
shim beneath bearing block that needs to be
adjusted.

Note: Use shims from your old cutterhead

if available. If not available, newspaper is
approximately 0.003" thick and will work for
shimming. We don't recommend shimming
more than 0.004" on either side, as this may
affect how the bearing block seats in the
casting.

Checking cutterhead parallelism.

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24. Repeat Steps 21–23 and adjust if necessary,
then tighten cap screws on bearing block
studs.

T27697/T27699 6" & 8" Helical Cutterheads

25. Re-install V-belt on pulleys. (Refer to instruc­tions in your jointer manual for details.)

26. Place straightedge on outfeed table so
it extends over cutterhead, and rotate
cutterhead pulley until one of the carbide
inserts is at top-dead-center (TDC), as shown
in Figures 11 & 12.

When correctly set, carbide insert will just touch
straightedge when insert is at its highest point of
rotation (see Figure 13).

Straightedge

Outfeed Infeed

Top Dead

Center

Figure 11. Cutterhead insert at top-dead-center.

Figure 13. Using a straightedge to align outfeed

table height with insert at TDC.

—If your outfeed table is correctly set, no

adjustments are necessary.

—If insert lifts straightedge off table or table

is below straightedge, adjust outfeed table
height with outfeed table adjustment lever
until straightedge just touches an insert at
its highest point of rotation.

27. Lock outfeed table, then re-install fence.

28. Install cutterhead guard back over cutterhead,

making sure spring tension in guard is proper­ly set so guard springs back over cutterhead
when it is pulled back and released.

29. Re-adjust infeed table.

30. Re-install rabbet extension table, belt cover,

and rear cover.

Figure 12. Setting outfeed table height.

T27696/T27699 6" & 8" Helical Cutterheads

31. Reset positive stop bolts on infeed and
outfeed tables.

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Rotating/Changing Carbide Inserts

Tools Needed:

L-Handle Torx Driver T20 .................................. 1

Each insert can be rotated to reveal any one of its
four cutting edges. Therefore, if one cutting edge
becomes dull or damaged, simply rotate it 90˚ to
reveal a fresh cutting edge (see Figure 14).

Reference Dot

Accessories

G8995—4" Heavy Duty Pulley Puller

Indispensable for pulling gears or pulley off of
press-fit shafts. Can be used in either a 2 or 3
jaw configuration. The 4" jaw fingers are also
reversible so they can grab an outside or inside
diameter. The forcing screw has a live center and
is made of tough hardened steel.

Figure 14.

In addition, each insert has a reference dot on
one corner. As the insert is rotated, the refer­ence dot location can be used as an indicator of
which edges are used and which are new. When
reference dot revolves back around to its starting
position, the insert should be replaced.

To rotate or change a carbide insert:

1. DISCONNECT MACHINE FROM POWER!

2. Remove any sawdust from head of carbide

insert Torx screw.

3. Remove Torx screw and carbide insert.

4. Clean all dust and dirt off insert and cutterhead

pocket from which insert was removed, and
replace insert so a fresh, sharp edge is facing
outward.

Rotating indexable carbide inserts.

Figure 15. G8995 4" Heavy Duty Pulley Puller.

T27714 —10 Pack of Indexable Carbide Inserts

Replacement 15 x 15 x 2.5mm carbide inserts for
T27697 and T27699 cutterheads.

Figure 16. T27714 Indexable Carbide Inserts.

G9644—12" Precision Straightedge
H2675—16" Precision Straightedge

Is your straightedge really straight? These grade
00 heavy-duty stainless steel straightedges are
manufactured to DIN874 standards for profes­sional results in setup and inspection work.

Note: Proper cleaning is critical to achieving

a smooth finish. Dirt or dust trapped between
the insert and cutterhead will slightly raise the
insert, and make a noticeable marks on your
workpieces the next time you plane.

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Figure 17. Precision straightedges.

T27697/T27699 6" & 8" Helical Cutterheads

Parts Breakdown and List

4

1

2

3

5

T27697 Parts

REF PART # DESCRIPTION REF PART # DESCRIPTION

1 PT27697001 HELICAL CUTTERHEAD 8" 4 PT27697004 L-WRENCH TORX T20
2 PT27697002 INDEXABLE INSERT 15 X 15 X 2.5 5 PT27697005 DRIVER BIT TORX T20
3 PT27697003 FLAT HD TORX SCR T20 M6-1 X 15

T27699 Parts

REF PART # DESCRIPTION REF PART # DESCRIPTION

1 PT27699001 HELICAL CUTTERHEAD 6" 4 PT27699004 L-WRENCH TORX T20
2 PT27699002 INDEXABLE INSERT 15 X 15 X 2.5 5 PT27699005 DRIVER BIT TORX T20
3 PT27699003 FLAT HD TORX SCR T20 M6-1 X 15

T27696/T27699 6" & 8" Helical Cutterheads

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