NEW! HOLLOW-PRO M4 Scrapers now available in a longer EXTENDED version!
For situations where you need a little extra reach, with both the straight and bent, 1/2" and 5/8" tools.
photos by Chris Bossardet
HOLLOW-PRO ROCKET tools are professional, fast and efficient hollowing tools for making hollow vessels up to about 7" high x about 7" diameter. These 8" tools have 3/8" shafts to allow hollowing through very small, restricted openings. The tools use replaceable #1 size carbide cutters and are designed to fit into any large handle with a 3/8" or 1/2" opening. (Tip: place the screws from these handles on the side or top of the tools, so the bottom will slide smoothly on the tool rest)
The round shafts of these tools can be rotated slightly to make clean "shear" cuts and the bent tool is also very useful for undercutting the openings on larger hollow vessels.
Set of one straight and one bent tool includes replaceable Hunter #1 carbide cutters for clean cuts and durability, and a Torx wrench for rotating and replacing the cutters as needed.
Notes On Use of Hollow-Pro Rocket Tools
The Hollow-Pro Tools 3/8" ROCKET straight tool is a very versatile and efficient tool that can be used to remove wood quickly and easily from hollow vessels and open bowls. It also works very well for hollowing out boxes.
The Hollow-Pro Tools 3/8" ROCKET bent tool was designed to hollow vessels up to about 7" in diameter, but is also intended to be used on larger pieces as well. By using the smaller tool to undercut the first portion of larger vessels the tool rest is closer, resulting in a cleaner cut and greater control. The larger Hollow-Pro Tools bent tools can then be used to continue hollowing pieces up to about 14-15" diameter.
The basic carbide cutter for all the Hollow-Pro 1/2 and 5/8 tools is the #1 swivel tip cutter assembly. The M4 scraper is also highly recommended for use with all 4 tools. Mike uses the carbide cutter for most of his hollowing and then switches to the M4 scraper to achieve his final wall thickness. The scraper is also his choice to remove the nub at the bottom.
These tools have been specifically designed to use the Hunter carbide cutters; the negative angle makes the carbide less aggressive and easier to control. They will remove wood quickly and efficiently from open bowls and hollow vessels. The tools use both #1 and #2 size carbide swivel tip cutter assemblies and the M4 powdered metal scraper which is recommended for final finish cuts. The swivel tip cutter assemblies and scraper are sold separately. Both the 1/2" and 5/8" tools are designed to fit into any large handle with a 5/8" opening.
The #2 standard swivel tip cutter assembly - only recommended for rapid, aggressive wood removal, using the 5/8 straight tool.This is an excellent choice for open bowls.
The #2 negative swivel cutter assembly - gives less aggressive cuts with all the tools, similar to a scraper that doesnt need to be sharpened and some turners prefer this cutter for the bent tools.
Available now through Craft Supplies USA
Straight and bent Hollow Pro Tools are available with:
1/2" square shaft (overall length 10")
5/8" square shaft (overall length 15")
5/8" Bent Tool with Torx wrench and #2 swivel tip cutter assembly with Torx wrench
Notes On Use of Hollow-Pro Tools
IMPORTANT: The tool rest height should be adjusted so that when the tool is held straight (parallel to the bed of the lathe) the tip is cutting at the center line of the turning. For less aggressive cuts, raise the handle slightly. Avoid lowering the handle, as that will raise the cutter tip and could result in a very aggressive angle of cut. Tighten the swivel tips securely with the included Torx wrench. Mike recommends holding the handle against your body and practicing with the tools on an open bowl before using them on a hollow vessel.
TIP: To avoid stripping out the Torx screws, make sure you clean them out before tightening or loosening them, so the wrench can seat properly. An airgun and/or a small piece of wire or a sharp pointed object like a dental pick or a safety pin, works well.
Straight hollowing tools are easier to control and more suitable for turners learning to make hollow vessels. The use of a bent tool is necessary for many hollow form shapes, but requires more experience to master. The Hollow-Pro Tools 1/2" and 5/8" straight tools are very versatile and efficient tools that can be used to remove wood very quickly and easily from hollow vessels and open bowls. These tools accept both the #1 and #2 size swivel tip shafts, but Mike recommends the #2 size for the larger 5/8" tool.
All bent hollowing tools that are meant to be hand-held should only be used with the straight part of the shaft on the tool rest. With Hollow-Pro Tools this indicates that the shaft is aligned with the cutter, making the tools easier to control. The tool rest height is particularly important when using bent tools, so make sure the tip is cutting on the center line of the turning and that you are not lowering the handle, which raises the tip to a more aggressive angle. The Hollow-Pro Tools1/2" bent tool was designed to hollow vessels up to about 8" in diameter, but is also intended to be used on larger pieces as well. By using the smaller tool to undercut the first portion of larger vessels the tool rest is closer, resulting in a cleaner cut and greater control. The larger Hollow-Pro Tools 5/8" bent tool can then be used to continue hollowing pieces up to about 14-15" diameter.
Hollow-Pro Scrapers Original & Extended
Made from high quality M4 powdered metal, they are sharpened with a 75 degree grind and have been heat treated to HRC 62-64. The scrapers may be resharpened with a diamond hone or light careful grinding. Since all Hollow-Pro Tools have a built in negative angle at the tip, when the M4 scrapers are inserted the result is a clean, less aggressive, final finish cut. Mike recommends using the scraper for your last few cuts, when you are close to your final wall thickness.
CHOOSING THE TOOLS AND CUTTER TIPS
My 4 tools together are a complete
hollowing system, with different choices of tips, depending
on what size hollow form and what type of wood you are
turning. They are made in Minnesota by Hunter Tools
and they use his nano-carbide cutters that last a long time
and don't need to be sharpened. Sometimes I need to
try and see what cutter tip will work best, depending on
what I am turning. If you have all the tools and
cutters, you have more choices of options, to try and see
what works on a particular piece of wood.
Thanks - Mike Jackofsky
For more info on the use of Hollow-Pro
Tools, please visit the Video Page to view excerpts from
Mike's tutorial DVD "Woodturning with Mike Jackofsky: Making
a Hollow Vessel"
design by Rick Jackofsky