21792 scratch awl - rockler woodworking and hardwarego.rockler.com/tech/21792-scratch-awl.pdf ·...

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Scratch Awl Preparation and Turning 21792 © Rockler Companies Inc. 2012 Visit Rockler.com for the most current product information and videos or call 1-800-260-9663. Slimline Bushing Set Brass Tube Adjustable Mandrel “A” Nut Brass Tube Nut Mandrel “A” Slimline Bushing Set Wood Spacer Mandrel “A” Setup: Adjustable Mandrel Setup: Blank Preparation 1. Drill the blank with a 7mm drill bit at a speed of 900 to 1200 RPM. 2. Polish the Brass Tube with 220 grit sandpaper to remove oxidation and roughen the Tube for better adhesion. This can be done by hand or by chucking it in a drill press or portable hand drill. 3. Prepare to glue with medium CA (cyanoacrylate) glue or two-part fast drying epoxy. 4. Apply the glue to the outside of the Brass Tube with a liberal amount around the end that is inserted first. Do not apply glue to the inside of the blank, as this will cause the glue to get inside the Brass Tube and ruin it. 5. Method 1: Insert the Brass Tube with a twisting motion into the blank until equal lengths of the Brass Tube (approximately 1/4" or 6mm) are exposed on either end of the blank for the Threaded Couplers. Wipe off any excess glue on the ends of the blank and on the Brass Tube and allow the glue to dry. Method 2: Insert the Brass Tube with a twisting motion into the blank until the Tube is equidistant between both ends of the blank. Wipe off any excess glue on the ends of the blank. Allow the glue to dry. 6. Method 2: Using a barrel trimmer, disk, or belt sander, trim the ends of the blank until you can just see the bright brass ends of the Tube. The face of the ends must be perpendicular to the Tube and parallel with each other. It is imperative to match the length of the trimmed blank to the original length of the Tube and that the inside of the Tube is clean and free of any glue. Turning the Blanks 1. Assemble the blank on the mandrel with the bushings placed on either side of the blank. Note that all of the bushings are the same size. Note: Either Wood Spacers or extra Bushings may be used to fill the extra space on the mandrel. 2. Tighten the tailstock and then tighten the mandrel nut that holds the blank. Do not over-tighten the tailstock or mandrel nut as this may cause the mandrel to flex, causing the blank to go out of round. Method 2: Measure 7/32" (5.6mm) from each end of the Tube and make a definitive mark. Using a sharp parting tool, remove all of the wood from the 7/32" mark to the ends of the blank. Be very careful not to damage the Brass Tube. 3. Turn the blank to the desired shape. There must be a flat area measuring 5/8" or 16mm at the butt end of the awl to match with the Cap. There must be a flat area measuring 1/2" or 13mm at the point end of the awl to match with the Ferrule. 4. After turning, sand the surfaces in progressive steps of 220, 400, 600, and 1000 grit. If a higher finish is desired, micromesh sandpaper may be used. 5. Apply the finish of choice and polish. 6. Remove the blank from the mandrel. Method 1 Cut the blank to exactly 2 5 16" long. This will leave part of the Brass Tube exposed on either end of the blank. Method 2 Cut the blank about 1/8" longer than the Brass Tube to allow for “blow-out” or hole elongation. Later, you will need to turn a portion of the wood blank down to the Brass Tube on the lathe.

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Page 1: 21792 Scratch Awl - Rockler Woodworking and Hardwarego.rockler.com/tech/21792-Scratch-Awl.pdf · Assembly Read the assembly instructions completely before assembly. 1. Press one Threaded

Scratch Awl Preparation and Turning

21792

© Rockler Companies Inc. 2012Visit Rockler.com for the most current product information and videos or call 1-800-260-9663.

Slimline Bushing Set

Brass TubeAdjustable Mandrel “A” Nut

Brass Tube NutMandrel “A”

Slimline Bushing Set

Wood SpacerMandrel “A” Setup:

Adjustable Mandrel Setup:

Blank Preparation1. Drilltheblankwitha7mmdrillbitataspeedof900to 1200RPM.

2. PolishtheBrassTubewith220gritsandpapertoremove oxidationandroughentheTubeforbetteradhesion.This canbedonebyhandorbychuckingitinadrillpressor portablehanddrill.

3. PreparetogluewithmediumCA(cyanoacrylate)glueor two-partfastdryingepoxy.

4. ApplythegluetotheoutsideoftheBrassTubewithaliberal amountaroundtheendthatisinsertedfirst.Donotapply gluetotheinsideoftheblank,asthiswillcausetheglue togetinsidetheBrassTubeandruinit.

5. Method 1:InserttheBrassTubewithatwistingmotion intotheblankuntilequallengthsoftheBrass Tube(approximately1/4"or6mm)areexposedoneither

endoftheblankfortheThreadedCouplers.Wipeoffany excessglueontheendsoftheblankandontheBrass Tubeandallowthegluetodry. Method 2:InserttheBrassTubewithatwistingmotioninto theblankuntiltheTubeisequidistantbetweenbothends oftheblank.Wipeoffanyexcessglueontheendsofthe blank.Allowthegluetodry.

6. Method 2:Usingabarreltrimmer,disk,orbeltsander, trimtheendsoftheblankuntilyoucanjustseethebright brassendsoftheTube.Thefaceoftheendsmustbe perpendiculartotheTubeandparallelwitheachother.It isimperativetomatchthelengthofthetrimmedblankto theoriginallengthoftheTubeandthattheinsideofthe Tubeiscleanandfreeofanyglue.

Turning the Blanks1. Assembletheblankonthemandrelwiththebushings placedoneithersideoftheblank.Notethatallofthe bushingsarethesamesize. Note:EitherWoodSpacersorextraBushingsmaybe usedtofilltheextraspaceonthemandrel.

2. Tightenthetailstockandthentightenthemandrelnutthat holdstheblank.Donotover-tightenthetailstockormandrel nutasthismaycausethemandreltoflex,causingtheblank togooutofround. Method 2:Measure7/32"(5.6mm)fromeachendofthe Tubeandmakeadefinitivemark.Usingasharppartingtool, removeallofthewoodfromthe7/32"marktotheendsof theblank.BeverycarefulnottodamagetheBrassTube.

3. Turntheblanktothedesiredshape.Theremustbeaflat areameasuring5/8"or16mmatthebuttendoftheawlto matchwiththeCap.Theremustbeaflatareameasuring 1/2"or13mmatthepointendoftheawltomatchwith theFerrule.

4. Afterturning,sandthesurfacesinprogressivestepsof 220,400,600,and1000grit.Ifahigherfinishisdesired, micromeshsandpapermaybeused.

5. Applythefinishofchoiceandpolish.

6. Removetheblankfromthemandrel.

Method 1Cuttheblanktoexactly25⁄16"long.ThiswillleavepartoftheBrassTubeexposedoneitherendoftheblank.

Method 2Cuttheblankabout1/8"longerthantheBrassTubetoallowfor“blow-out”orholeelongation.Later,youwillneedtoturnaportionofthewoodblankdowntotheBrassTubeonthelathe.

Page 2: 21792 Scratch Awl - Rockler Woodworking and Hardwarego.rockler.com/tech/21792-Scratch-Awl.pdf · Assembly Read the assembly instructions completely before assembly. 1. Press one Threaded

AssemblyReadtheassemblyinstructionscompletelybeforeassembly.

1. PressoneThreadedCouplerovereachexposedendof theBrassTube.TheThreadedCouplershavealarger diametersteppedareaontheinsidewhichmakesiteasy tofittheThreadedCouplerontotheBrassTube.

2. ThreadtheCapontotheThreadedCouplerwiththe5/8" flatmatingarea.

3. InserttheAwl,threadedendfirst,intotheremaining ThreadedCoupler.ThreadtheAwlintotheCap.

4. SlidetheFerruleontotheAwlpointandthreaditonto theThreadedCoupler.

Reordering Information Stock #ScratchAwlKit.....................................................217927mmMandrel“A”with#2MorseTaper...............435377mmMandrel“A”with#1MorseTaper...............39389Adjustable7mmMandrel“A”with#2MorseTaper............................................25581SlimlineBushingSet............................................435467mmDrillBit.........................................................36372PenMillKit...........................................................47526

Scratch Awl Assembly

21792 - Rev 10/12

WARN

ING: T

his product contains one or m

ore chem

icals, including lead, that are know

n to the State of C

alifornia to cause cancer and birth defects or other reproductive harm

. W

ash hands after handling.

Made in C

hina

Distributed by R

ockler C

ompanies Inc.

© 2012 R

ockler Woodw

orking and H

ardware

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Cap

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Ferrule

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