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The Model D4934 13" Helical Cutterhead is 

designed to be used ONLY with the DeWalt 

DW735 and DW735X Planers. DO NOT install 

the Model D4934 in any other planer model 

or make. Failure to comply can result in 

serious personal injury!

Figure 1. Model D4934 Inventory.

COPYRIGHT © SEPTEMBER, 2020 BY WOODSTOCK INTERNATIONAL, INC.

WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE OR FORM WITHOUT

THE WRITTEN APPROVAL OF WOODSTOCK INTERNATIONAL, INC.

Printed in Taiwan

#21332KS

Model D4934

13" Helical Cutterhead for

DeWalt DW735/DW735X Planer

Instruction Sheet

Phone #: (360) 734-3482 • Tech Support: [email protected] • Web: www.woodstockint.com

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Introduction

The D4934 13" Helical Cutterhead is designed 

to replace the straight-knife cutterhead on the 

DeWalt DW735 and DW735X Planers.

The total procedure of changing the cutterhead 

and reassembling the planer takes approximately 

three hours. Read these instructions thoroughly 

before beginning. These instructions make 

reference to many procedures detailed in your 

planer manual. Always consult your manual for 

these procedures. 

We strongly recommend using the new 

replacement bearings included with the D4934, 

even if the existing bearings appear to be in 

good condition. Call Technical Support at (360) 

734-3482 if you need help.

Recommended Tools

Description Qty

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

Open-End Wrench 6, 24 mm .................. 1 Ea.

Deep Well Socket 31, 40mm .................. 1 Ea.

Retaining Ring Pliers ................................1

Hex Wrench 4mm ....................................1

Torx Driver T-30 (Included with DW735/X) ......1

Phillips Screwdriver #2 ..............................1

Steel Hammer ........................................1

Hex Bolt 

5

16

"-18 x 2 .................................1

Wood Board (Minimum 12" Length) ...............1

Tape ........................................ As Needed

Scrap Cardboard ......................... As Needed

Specifications

Maximum Width of Cut ...........................13"

Cutterhead Diameter ............................1

7

8

"

Number of Cutter Rows .............................3

Total Number of Indexable Inserts .............. 30

Inventory (Figure 1)

Description Qty

A.  Ball Bearing 6202-2NSE ........................1

B.  Ball Bearing 6204-2NSE ........................1

C.  Flat HD Torx Screws T-25 #10-32 x ½".......5

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

E.  T-Handle Torx Driver T-25 .....................1

F.  Helical Pinion Gear 8T .........................1

G.  Helical Cutterhead 13" ........................1

Summary of Contents for D4934

Page 1: ...ours Read these instructions thoroughly before beginning These instructions make reference to many procedures detailed in your planer manual Always consult your manual for these procedures We strongly recommend using the new replacement bearings included with the D4934 even if the existing bearings appear to be in good condition Call Technical Support at 360 734 3482 if you need help Recommended T...

Page 2: ...utterhead 1 DISCONNECT MACHINE FROM POWER 2 Use T 30 Torx driver included with DW735 X to remove screws holding top cover see Figure 2 3 Remove red wing nuts holding dust shroud and set aside see Figure 3 4 Rotate dust shroud away from cutterhead so alignment arrow on fan housing aligns with OPEN line on dust shroud as shown in Figure 4 5 Pull dust shroud away from fan housing and remove CAUTION C...

Page 3: ...wly rotating cutterhead pulley counterclockwise and pulling belt off Use rear roller to secure belt after removal 17 Cover table under cutterhead carriage with scrap cardboard to protect surface from dropped parts tools 18 Press cutterhead lock lever and rotate cutterhead until T 30 Torx screws are visible on knife clamp see Figure 8 19 Remove screws securing knife clamp Note T 30 Torx driver incl...

Page 4: ... speed selector switch to speed 2 26 Pull gearbox out and rest it on planer mount Note Gearbox speed selection rod and positioning pin will prevent gearbox from being completely removed from planer Secure gearbox to planer with tape or rope to prevent it from shifting during disassembly 27 Insert a wood board at least 12 in length between cutterhead and cutterhead carriage see Figure 11 Verify cut...

Page 5: ...r dirt 3 Lower cutterhead into carriage while guiding threaded end through right bearing bore see Figure 16 4 Install 5 16 18 x 2 hex bolt into helical pinion gear threads 5 Seat 6202 2NSE ball bearing into left bearing bore using hex bolt as an alignment guide 6 Use 31mm deep well socket or wood block to gently tap bearing into bore until retaining ring groove is visible and bearing is flush with...

Page 6: ...e install 24mm hex nut onto cutterhead pulley 14 Remove hex bolt and install helical pinion gear 15 Remove wood board 16 Remove drive belt cover located on right side see Figure 19 and verify that drive belt is centered on drive wheel 17 Gently stretch drive belt over cutterhead pulley while slowly rotating pulley clockwise until belt is centered Note Drive belt and pulley wheels have grooves alon...

Page 7: ...l sprockets and chain on front and rear rollers see Figure 22 27 Re attach spring to chain tensioner Verify tensioner is engaged with chain as shown in Figure 22 28 Re install retaining rings on front and rear rollers see Figure 22 29 Re install gearbox cover 30 Re install sprockets and chain on front and rear rollers in pulley area see Figure 23 31 Re install chain tensioner and re attach spring ...

Page 8: ...d cutterhead will slightly raise the insert making noticeable marks on your workpieces the next time you plane 6 Lubricate Torx screw threads with a light machine oil wipe excess oil off threads and torque screw to 48 50 inch pounds 7 Return planer to its original configuration by performing Steps 33 38 of Installing Helical Cutterhead instructions Accessories D4297 Indexable Carbide Inserts 10 pa...

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