Required Accessories:• Conical grinding stone #PKURCHGS• 3 Jaw drilling chuck #TM32• Mod Podge or other wood glue & brush

#PKURCH4 PSI Woodworking Products

SPUTNIK SEA URCHIN PROJECTS

Preparing the Urchin NOTE: Urchin holes will vary, measure each hole before turning your project.• To reinforce the urchin wall to avoid cracking, use Mod Podge® or other glue on the inside surface, let dry.• Affi x the grinding stone into a 3 Jaw drill chuck or a portable hand power drill. Dia. B • Slowly engage the wheel stone with the urchin hole and grind to reshape and round the holes A & B to be perfectly round or to a desired diameter.• Use a disk sander or a course abrasive to fl atten the surfaces around the holes. Do not over sand or it will weaken the shell. Dia. A• The urchin is ready to use for your projects.

DIAGRAM A / Preparing the Urchin

DIAGRAM B / Rounding the Urchin Holes

A

C

B

SandSurfaceFlat

SmallerHole

LargerHole

See Section 2 for Bottle Stopper Project

See Section 3 for Finial Project

SandSurfaceFlat

Grinding Stone

DIAGRAM B / Rounding the Urchin HolesDIAGRAM B / Rounding the Urchin Holes

PSI Woodworking Products

See Section 2 for Bottle See Section 2 for Bottle Stopper ProjectStopper Project

Grinding Stone

Glue C

oating Inside

Section 2.) Bottle Stopper Project Bottle Stopper #BS1Required Accessories: • Blank Required 1-1/2 x 4” L• Project starter set #PKURCHSS

Bottle Stopper #BS1Includes: 4 ea Sea Urchins #PKURCH44 ea Bottle Stoppers #BS11 ea Grinding Stone #PKURCHGS Bottle stopper chuck system #PKBSYST

Diagram C / Turning the Stopper Blank

Bottle Stopper Chuck

Urchin Shell

Part the tenon here when done turning

Diameter B

Diameter A

Stopper Blank: 1-1/2” x 4” Long

NOTE: Urchin shown for size. DO NOT mount in lathe

Live Center

AE*

C

D* B

3/16”3/16”

5/16” hole x (3/8” x 16 tpi)3/4” deep

Stopper Top:Any Profi le

*D: Turn wide enough to exceed the “A” diameter by at least 1/4”

*E: Turn wide enough to exceed the “B” diameter by 1/4”

A,B,C - To fi t Urchin holes & width

Section 1.) Preparing the Sputnik Urchin for Projects in Sections 2 & 3

#PKURCHSS PSI Woodworking Products

Preparing the Blank: • Mark the center on both ends of the blank.• Drill a 5/16” x 1” deep hole at one end of the blank.• Tap the hole with 3/8” x 16” Tap (From #PKBSYST Set).• Mount the stopper chuck onto the head stock of the lathe.• Slide the tailstock in to support the other end.• Prepare your top design/drawing idea.• Measure the hole sizes of the urchin you prepared (Sizes A & B from Diagram “A”), apply size to your drawing. Measure the height of the urchin (Size C from Diagram “C”) and allow plenty of space for the ends to butt after parting for gluing.• Mount your blank onto the bottle stopper chuck using the instructions provided with #BS1• Turn the blank down to the measurements you applied to your individual urchin from diagram “B”. Turn diameters D & E to fi t ends of urchin.• Sand and polish the project. Avoid fi nishing the concealed section of wood.• Use a thin parting tool to part the wood where indicated in diagram “C”.

Assembly:• Test that each tenon fi ts in the hole. Do not force into the fragile shell.• Use drops of glue to secure the urchin between the wooden ends.• Attach the tapered stopper section into the wood, screw in place.

Section 3.) Hanging Ornament ProjectRequired Accessories: • 1-1/2” x 6” L Blank • ¼” Drill Bit• CA or Epoxy Glue• Hanger Stud (Set of 4 ) #PKURSTUD4

Measure the hole sizes of the urchin you prepared (Sizes A & B from Diagram “A”), apply size to your drawing. Measure the height of the urchin (Size C from

Turn the blank down to the measurements you applied to your individual urchin from diagram “B”. Turn diameters D & E to fi t ends of urchin.

Diagram D / Turning the Ornament Blank

Drive Center

Lower End Upper End

Hanging Stud

1-1/2 x 6” LongBlank

Part HerePart Here

Hole for Hanging Stud1/4” x 3/8” Deep

3/16”

2”

D EB A

Preparing the Blank• Mark the center on both ends of blank• Drill a ¼” hole x 3/8” deep in one end (To Mount Stud)• Measure the opening of the urchin enter the hole size into your Diameter

Turning the Blank• Mount the blank between centers (Follow Diagram “C”)• Turn the blank to the profi le of your choice. Match the center to the holes A & B in the urchin - Turn diameters D & E to exceed the holes A & B• At the drive end leave extra wood for support until polished• Use a narrow parting tool or saw off in the center to part the blanks See Diagram C

• Test that each tenon fi ts in the whole. Do not force into fragile shell• Squeeze glue over the parted stem and around the urchin opening to stay connected• Finish the lower end by hand• Squeeze a glue drop into the stud hole. Insert the stud in place• Attach a string through the stud hole to hang

© 2019 PSI Woodworking Philadelphia PA 19115 - v11/19

Assembly

NOTE: Urchin shown for size. DO NOT mount in lathe