Grizzly T10667, T10668 User Manual

MODEL T10667/T10668

BALD EAGLE FLOATING

REAMER HOLDER KIT

INSTRUCTIONS

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Introduction

The T10667/T10668 Bald Eagle Floating Reamer
Holder Kit provides excellent accuracy and con­trol when chambering gun barrels. The holder
compensates for a small amount of misalignment
between the chuck and tailstock, allowing the
reamer enough free movement to remain aligned
with the bore.

This type of holder permits the user to control the
reaming process and release the reamer from
action, preventing damage that can occur to a
barrel when reamers bind.

This reamer holder is only designed for use with
reamers that have properly fit bore bushings or
solid piloted reamers that have the pilot bushing
fitted to the bore. We recommend pre-boring the
chamber a little undersize and using a roughing
and/or a finishing reamer to complete the process.

Kit Specifications

T10 667 Tap er ............................................. MT#3

T10668 Taper ............................................. MT#4

Inventory

Description Qty

A. Floating Reamer Holder ............................. 1

B. Round-Nose Dead Center .......................... 1

A

Figure 1. T10667 Bald Eagle Floating Reamer

Holder Kit.

B

Operation

This floating reamer holder is designed to comple­ment a precise setup—not make up for an inac­curate one. Before attempting to use the floating
reamer holder, it is critical that every component
used in your setup is adjusted as accurately
as possible. Additionally, alignment adjustments
should be indicated off the bore—not the outside
of the barrel.

Because a floating reamer is not rigidly restrained
like other methods of reamer control, it takes
experience through repetition to use it proficiently.
Before working with an expensive barrel, we
highly recommend practicing on a scrap barrel
until you are familiar with the feel and technique
of using a floating reamer.

COPYRIGHT © APRIL, 2013 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.

#DM15699 PRINTED IN USA

To use the floating reamer holder when cham­bering a gun barrel:

1. Set up the barrel in your lathe, per your nor-

mal method, centering the bore of the barrel
as accurately as possible.

2. Assemble the reamer (not included) and
holder by inserting the reamer shank into the
holder and tightening the set screws against
the reamer flats with a 3mm hex wrench (see

Figure 2).

6. Move the tailstock forward until the rounded

end of the dead center begins to enter the
reamer holder (see Figure 3).

Reamer

Bushing

Flats

Figure 2. Floating reamer holder and reamer

assembled.

3. Insert the round-nose dead center into your
tailstock.

4. Apply an ample amount of cutting oil inside
the barrel and on the cutting end of the ream­er.

Note: You will need to continue to provide

enough cutting oil throughout the reaming
process to ensure a clean cut and tool lon­gevity.

Holder

Set Screws

Figure 3. Inserting the dead center into the

reamer holder using the tailstock.

7. Turn the lathe ON and slowly apply pressure,
using the tailstock quill handwheel (after
tailstock has been locked onto the bed).

8. Feed the reamer into the barrel bore and
make cuts in short increments, stopping
frequently to remove chips from inside the
flutes.

We highly recommend that you remove the

reamer every 0.020" to 0.050" and clean off
the chips from both the reamer as well as the
bore and re-oil before continuing.

Note: Galling in the chamber from chips

packing in the flutes can tear the metal sur­face in the bore and create grooves in the
chamber.

5. Carefully insert the reamer bushing into the
bore while supporting the reamer holder in
your hand, so the bushing does not bind.

Note: If the bushing binds, it might leave

marks inside the barrel, so it is important that
you carefully support the weight of the reamer
in your hand while inserting the length of the
bushing into the bore.

-2-

9. While stopping the lathe, slightly relieve the
tailstock pressure. DO NOT pull the ream­er back before the spindle has completely
stopped, as this could scar the chamber.

10. Continue repeating Steps 3–9 until the ream­ing process is finished. For precise results,
decrease cutting increments as you near the
end of the chamber.

T10667/T10668 Floating Reamer Holder