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T27694
User guide
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Grizzly T27694 User guide

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MODEL T27694 & T27695
15" & 20" INDEXABLE INSERT
HELICAL CUTTERHEADS
INSTALLATION INSTRUCTIONS
For questions or help with this product contact Tech Support at (570) 546-9663 or techsupport@grizzly.com
Introduction
The T27695 15" and T27694 20" indexable insert helical cutterheads are designed fit Grizzly planer Models G0453, G0453Z, G0454, and G0454Z.
Do NOT modify or alter these cutterheads to make them fit other makes or models of planers for which they aren't designed. Doing so could result in property damage or serious personal injury.
The total procedure of changing the cutterhead and setting up the planer takes approximately three hours. Read these instructions thoroughly before beginning. We strongly recommend replacing the old cutterhead bearings at the time of installation. The T27694 uses (2) 6206ZZ bearings. The T27695 uses (1) 6204ZZ bearing and (1) 6205ZZ bearing.
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 concepts described in the procedure.
Recommended Tools
Hex Wrench 5mm .............................................. 1
Shop Rags ......................................... As Needed
Drain Pan .......................................................... 1
Gear Case Oil ISO 320 .................... As Needed
Assistants ....................................................... 1-2
Heavy Cardboard .............................. As Needed
Heav y Tap e ....................................... As Needed
Replacement Gaskets and Seals ...... As Needed
Inventory
D. Flat Head Torx Screws M6-1 x 15 .............. 3
Specifications
T27694
Maximum Width of Cut ................................... 20"
Cutterhead Diameter ..................................81mm
Number of Indexable Carbide Inserts ........... 100
T27695
Maximum Width of Cut ................................... 15"
Cutterhead Diameter ................................. 76mm
Number of Indexable Carbide Inserts ............. 75
COPYRIGHT © OCTOBER, 2016 BY GRIZZLY INDUSTRIAL, INC.
NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
#MN18209 PRINTED IN CHINA
A
C
E
D
Figure 1. Model T27694/T27695 inventory.
V1.10.16
B
8. Remove the table elevation handwheel and key.
Cutterhead knives and inserts are razor sharp! Always wear heavy leather gloves when handling cutterheads, and avoid contact with cutters whenever possible. Failure to comply can result in serious cuts or laceration injuries.
Removing Existing Cutterhead
1. DISCONNECT MACHINE FROM POWER!
2. Remove top cover and dust port to expose
cutterhead.
3. Remove knives from existing cutterhead.
4. Remove belt cover, and then remove V-belts
from pulleys.
Note: This may require loosening belt ten-
sion. This procedure is outlined in SERVICE section of your planer manual.
5. Remove hex bolt securing cutterhead pulley in place.
9. Remove both rear guards from sprocket cover, as shown in Figure 3.
Figure 3. Sprocket cover rear guards.
10. Remove sprocket cover cap screw and
sprocket cover.
11. Remove cap screws and washers from three sprockets, shown in Figure 4, to expose sprocket keys.
6. Rotate cutterhead until cutterhead pulley key is at an upright position.
7. Remove pulley and key. If pulley is difficult to remove, use a pulley puller, as shown in Figure 2 (see Page 6 of this instruction sheet if you do not have a pulley puller).
Figure 2. Pulley puller installed on cutterhead.
12. Unhook idler spring shown in Figure 4 and
move idler up out of the way.
13. Rotate cutterhead so sprocket keys are in a generally upright position (see Figure 4). This prevents keys from falling out.
Idler
Key
Idler Spring
Key
Figure 4. Example of sprockets and chains.
14. Mark outside of sprockets with correction
fluid as a way of remembering which side of each sprocket faces outward.
Key
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T27694/T27695 15" & 20" Helical Cutterheads
15. Remove sprockets, keys and chains all at once, taking care to keep chains intact.
16. Thoroughly drain planer gearbox into a drain pan by removing drain plug shown in
Figure 5.
19. Remove four cap screws at the top of gear-
box, shown in Figure 7.
Fill Plug
Figure 5. Drain and fill plug locations.
17. Insert (6) 4" 2x4 blocks directly beneath
cutterhead, as shown in Figure 6.
Drain Plug
4" 2x4 Blocks
15" PLANER
Figure 7. Gearbox cap screw location.
20. Have an assistant hold gearbox steady while
you use a rubber or wooden mallet to unseat cutterhead from headstock, as shown in
Figure 8.
Figure 8. Unseating cutterhead from headstock.
Figure 6. Support block locations.
18. Re-install handwheel and key, and carefully
raise table so cutterhead just touches blocks.
T27694/T27695 15" & 20" Helical Cutterheads
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21. Pull cutterhead gearbox assembly off planer and place on workbench.
22. Remove five cap screws from front of gearbox cover.
23. Separate gearbox cover by gently tapping near gasket using mallet and flat head screw­driver.
24. Remove cap screw from inside helical gear, shown in Figure 9, and remove gear.
Helical Gear
Cap Screw
Figure 11. Cutterhead removal.
27. Visually inspect all bearing bores, both on
headstock and in gearbox, and remove any burrs or rough spots that are present.
Installing Helical Cutterhead
We recommend that all gearbox seals and gas­kets be replaced before cutterhead installation, even if the seals or gaskets appear to be in good condition.
Figure 9. Helical gear and cap screw.
25. Insert spare M6-1 screw or bolt into hole at gearbox end of cutterhead shown in Figure
10.
Gearbox
Bearing
Screw Hole
Figure 10. Location of screw hole in cutterhead
removal.
26. While supporting gearbox, remove cutterhead by tapping on screw or bolt with a hammer, as shown in Figure 11. It may also be neces­sary to tap on back of gearbox with a rubber or wooden mallet.
NOTICE
Before removing any seals, note their orientation and how far they are driven into the bore (typically the lip of a seal will face inward toward the oil reservoir or body of liquid). This will aid in the replacement process. Failure to heed this notice can lead to fluid leakage and gearbox failure.
To install helical cutterhead:
1. Wrap new cutterhead in cardboard and
securely fasten it with heavy tape.
2. Install new bearing on cutterhead by very gently tapping it using a mallet and a 4" length of 1" inside diameter (I.D.) pipe, as shown in Figure 12 on Page 5.
Tip: Place wrapped cutterhead in a freezer
overnight before installing a new bearing. This will cause cutterhead metal to contract, making bearing easier to install.
Important: The pipe should contact the
inside race of the bearing only, as shown in Figure 12. Force on any other portion of the bearing WILL ruin the bearing!
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T27694/T27695 15" & 20" Helical Cutterheads
1" I.D. Pipe
(cut-away for
clarity)
8. Secure gearbox in place with cap screws removed in Step 19 of Cutterhead Removal instructions.
9. Refill gearbox with ISO 320 gear oil via fill plug shown in Figure 5 on Page 3.
Cutterhead
Contact Inside
Bearing Race
Only
Figure 12. Close-up of bearing installation.
3. Install cutterhead in gearbox by fitting it
into place, and seat it by tapping on pulley end with wooden or rubber mallet. Ensure cutterhead end is flush with inside face of gearbox bearing, as previously shown in
Figure 10 on Page 4.
4. Re-install helical gear and cap screw, ensur-
ing helical gear and cutterhead are engaged.
5. Ensure that gasket surfaces are clean and free of oil, grit or contaminants. If these are damaged, replace them.
Shaft
Cutterhead
10. Rotate all sprocket shafts so keyways are in a generally upward position. This prevents keys from falling out during installation of sprockets.
11. Re-install sprockets, chains and idler. Fasten sprockets using washers and cap screws removed in Step 11 on Page 2.
12. Re-install sprocket cover, including both rear guards, on sprocket cover.
13. With cutterhead shaft keyway in an upright position, install cutterhead pulley key into keyway.
14. Slide cutterhead pulley onto shaft, and secure with hex bolt removed in Step 5 of
Cutterhead Removal instructions.
15. Remove the protective cardboard and tape
from around the cutterhead.
6. Re-assemble gearbox, taking care to seat rubber gasket in alignment with gearbox covers.
7. Install cutterhead-gearbox assembly into planer. Seat cutterhead shaft bearing by tap­ping on gearbox with rubber or wooden mal­let, as shown in Figure 13.
Figure 13. Example of seating cutterhead-
gearbox assembly.
16. Re-install all belts and belt cover. Re-adjust V-belt tension if it was loosened in Step 4 of
Cutterhead Removal instructions.
17. Re-install all remaining covers and guards.
18. Follow the procedures outlined in your planer
manual for adjustment and calibration of your planer.
T27694/T27695 15" & 20" Helical Cutterheads
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Rotating/Changing Carbide Inserts
Tools Needed:
Number of Inserts
Model T27694 ............................................... 100
Model T27695 ................................................. 75
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
5. Lubricate Torx screw threads with light machine oil, wipe off excess oil, and torque Torx screw to 48-50 inch/pounds.
Note: Excess oil may squeeze between the
insert and cutterhead, thereby lifting the insert slightly and affecting workpiece finishes.
Accessories
G8995—4" Heavy-Duty Pulley Puller
Indispensable for pulling gears or pulley off of press-fit shafts. 4" jaw fingers can be used in either a 2 or 3 jaw configuration.
Figure 14. Carbide insert rotating sequence.
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.
Figure 15. G8995 4" Heavy Duty Pulley Puller.
T27714 —10 Pack of Indexable Carbide Inserts
Replacement carbide inserts for T27694 and T27695 cutterheads.
Figure 16. T27714 Indexable Carbide Inserts.
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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T27694/T27695 15" & 20" Helical Cutterheads
Parts Breakdown & List
Please Note: We do our best to stock replacement parts whenever possible, but we cannot guarantee that all parts shown here
are available for purchase. Call (800) 523 - 4777 or visit our online parts store at www.grizzly.com to check for availability.
1
5
2
3
4
T27694 Parts
REF PART # DESCRIPTION REF PART # DESCRIPTION
1 PT27694001 HELICAL CUTTERHEAD 20" 4 PT27694004 TORX BIT T-20 2 PT27694002 INDEXABLE CUTTER 15 X 15 X 2.5 5 PT27694005 L-WRENCH TORX T-20 3 PT27694003 FLAT HD TORX SCR T20 M6-1 X 15
T27695 Parts
REF PART # DESCRIPTION REF PART # DESCRIPTION
1 PT27695001 HELICAL CUTTERHEAD 15" 4 PT27695004 TORX BIT T-20 2 PT27695002 INDEXABLE CUTTER 15 X 15 X 2.5 5 PT27695005 L-WRENCH TORX T-20 3 PT27695003 FLAT HD TORX SCR T20 M6-1 X 15
T27694/T27695 15" & 20" Helical Cutterheads
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T27694/T27695 15" & 20" Helical Cutterheads
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