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There have been a few enquiries about Hemingway Unimat 3 accessories
so I decided to make this a separate topic.

When I checked with them a couple of years ago, they didn't sell any
Unimat 3 accessories any more & didn't have any details on what they
had sold. I have scanned an article from Engineering in Miniature
October 1993 which covers the accessories then available. This is
the "On The Shelf" section about equipment available from suppliers.

Although Hemingway may not supply these any more, I know that many of
these appeared in the English "Model Engineer" magazine. I'm sure
that I've got the Bed Stop, Four Way Turret Toolpost, & Lever Feed
designs from that source. Perhaps someone with a bigger magazine
collection may be able to find the Vertical Alignment Device.

I do have an advert somewhere that shows the Vertical Alignment
Device. It simply consited of two collars that mounted to the Unimat
Milling column at the top & bottom. A thin vertical rod mounted in a
protrusion from these collars & there was a replacement nut (or bolt -
not near my column at the moment) that extended at the end of the
current milling column head height adjustment. It had a hole through
it which slid up & down the vertical rod ensuring that stopped the
head from slipping arround & ensured that any adjustment was close to
vertical.

I think these may have been some of the accessory designs.

A Lever feed attachment for Unimat 3
Built & described by D. Goodwin
Model Engineer, Issue 3630, Vol 146, 04APR1980, Pg 422
Small drilling is often helped by having a sensitive lever feed
rather than having to wind the knob on the tailstock. A longer rear
bush is made for the tailstock to mount this attachment & an
extension piece screws onto the existing spindle.

Unimat 3 and Compact 5 Accessories 3. Unimat 3 and Compact 5
Topslide Stops
Built & described by Graham Nickson
Model Engineer, Issue 4000, Vol 175, 01SEP1995, Pg 268
An aluminium stop allows easily & accurately controlling the travel
of the Taper Turning Attachment cross slide. Hand Filing using
templates for accuracy & ease, or Dovetail Machining is required.

Regards,
Brian.

*** SCANNED ARTICLE ***

SMALL MACHINE TOOL ACCESSORIES FROM HEMINGWAY
(Engineering in Miniature October 1993)
("On The Shelf" Equipment Review Section)

Messrs Hemingway, the well known suppliers of machine tool
accessories in kit form, have produced a range of accessories
designed for users of the Emco Unimat 3 and Compact 5 and also Toyo
ML210 lathes. These accessories increase dramatically the
versatility of these machines. Each kit comes with instructions and
all necessary screws. All components are supplied in a chemically
blackened finish or a colour to suit the lathe.

SLOW SPEED ATTACHMENT FOR THE UNIMAT 3

This accessory overcomes the lack of a slow speed on the Unimat
3. It consists of a substantial steel pulley, which acts as a
flywheel, mounted on an extension arm and provides for speeds down to
55 rpm. Fitting involves drilling and tapping a single M5 hole in
the motor mounting plate and providing an extra drive belt. Full
instructions are provided with the accessory for positioning and
drilling and tapping the hole. This accessory will be found most
useful for dealing with the larger diameter workpieces which many
Unimats are asked to cope with.

BED STOP FOR THE UNIMAT 3

This simple accessory provides a convenient means of machining
dead length components on the lathe. The stop uses a single clamp
screw to attach it to the vee shear of the machine bed. A pair of
these stops is most useful when the Unimat is set up for milling. A
component requiring, say, a keyway to be machined may need a number
of successive passes of the cutter to reach full depth. Once the
length of cut has been determined by dial readings on the first pass,
taken to the extremities of the keyway, the stops may then be clamped
in place and work can safely proceed without further reference to
dial readings. The stop may also be used in conjunction with the
vertical alignment device for drilling to preset depths.

This item is finished in signal red as a visual reminder to remove
it when not in use.

VERTICAL ALIGNMENT DEVICE

This accessory is available for the Unimat 3, Compact 5 and Toyo
milling columns.

Its purpose is to eliminate the tiresome restrictions imposed by
the limited length of the quill stroke. By fitting this accessory
the milling head may be raised or lowered the full length of the
machine column without the loss of radial position. Two collars and
a precision ground guide bar form the basis of the accessory. A new
clamp, eliminating the Alien cap screw, is also provided, making
adjustment of the milling head more convenient. The vertical
alignment device allows the operator to clamp the milling head at any
radial position around the column and the head may also be swivelled
for angular drilling and milling.

LEVER FEED ATTACHMENT FOR UNIMAT 3 AND COMPACT 5 TAILSTOCK

This accessory is a must for drilling small holes on the Unimat
3. The standard tailstock feed screw denies the operator the 'feel'
which is so important when using small drills. Over feeding with a
tailstock feed screw will often lead to drill breakage.

The accessory as supplied fits directly to the existing lathe
tailstock and may be mounted in minutes. No drilling or other
modification is required to the tailstock casting. A depth stop ring
is included in the set of components.

To mount the accessory simply remove the cap nut and handwheel,
remove the grub screw securing the rear bearing which is now slid
out, and the feedscrew can at this point also be removed. Now screw
in the operating rod, but first make sure the depth stop ring is slid
on. The M6 cap screw is employed to secure the rear bracket. The
arrangement of the assembled accessory provides for the full travel
of the tailstock barrel. An extended tailstock body clamp screw is
employed to eliminate the use of the Unimat Alien key and this makes
for more convenient operation.

For the Compact 5 lathe, a similar lever feed attachment is
available and a number of components are common to both accessories.
Fitting is similar to that of the Unimat 3 and once again only takes
a few minutes. The operating lever can be arranged at an angle to
suit the operator's convenience.

INDEXING 4 WAY TOOL TURRET FOR THE UNIMAT 3

When one is faced with the production of a number of similar
components it is rather inconvenient, even with a quick change
toolpost, to be constantly changing tools between operations.

The four way toolpost from Hemingway solves all this; as up to
four tools may be kept ready mounted for use in succession. For
example, the following operations could be tooled up; face off, turn
down, chamfer and part off. Any tool with a 6mm or 1/4" shank can be
employed; and a number of suppliers can provide 'throwaway' tipped
tools in this shank size. These eliminate the necessity to reset the
tools after tips have been replaced in lieu of a sharpening
operation. The base of the new toolholder is provided with a positive
four position index. A quick release operating handle is provided to
obviate the need for Alien key operation and thus further improving
the versatility of this accessory. The toolpost can be fitted in
seconds to the Unimat cross-slide, which requires no modification. A
location for inserting into the pivot counterbore, normally used in
conjunction with the Unimat topslide, guarantees accurate location. A
dowel pin in the base of the accessory engages with the tee slot and
prevents rotation of the accessory under cutting load.

Full details of these accessories and all Hemingway products may
be obtained from:
N. S. & A. Hemingway, 30 Links View, Half Acre, Rochdale, Lancs.OL11
4DD
Telephone: (0706) 45404
(Please note that these contact details were in 1993 & may be
incorrect now.)

I don't think the stiffness or weight of the bed is a big problem. A
major weakness of the DB/SL design is the 2 round drillrod 'ways' that
are only supported at the ends. Any more than light tool pressure
causes these rods to bend, giving a less deep cut than expected.

Jay Kosta
Endwell NY
--- In UNIMAT@..., "regulator3777" <regulator3777@...>
wrote:

Hello all..I'm new to the group & have a question. Has anyone filled

in

the lathe bed with lead to add weight & mass ? If so, how did it

work-

out & was it worth doing ? "OJ"

Yahoo! Groups Links

Hello Norm,

When cutting the dove tail one side at a time with the center
already milled don't forget about changing direction of the cutting
when you change sides. What I am getting at is never use climb
milling on any Unimat. They just are not rigid enough. Use only
standard milling.

Best, Cary Stewart

--- In UNIMAT@..., "Norm" <nccyr1@> wrote:

Harvey & Mert,
Thanks for the replies.

If used in small increment, with cutting fluid (on AL) and
careful feeding rate vs speed, this dovetail cutter
should last me for many years to come I hope.

This news group is a great source for people like me.

Norm


--- In UNIMAT@..., "Mert Baker" <mertbaker@> wrote:

To cut dovetail slots, first use an ordinary endmill to cut most

of

the metal away. Then cut the DT one side at a time. On the Uni,

this

is best done in small increments. Brass is easier to cut, as a

rule,

than some Al alloys, especially the soft gummy stuff found in

hardware

stores. On Al, be sure to use a cutting fluid. WD-40 works, and
there are lots of others.

Mert

mertbaker@
----- Original Message -----
From: Norm
To: UNIMAT@...
Sent: Thursday, January 25, 2007 10:08 PM
Subject: [UNIMAT] any advice for first time milling with

dovetail

cutter ?

Hello,

I recently bought a dovetail cutter for my Unimat but
having never used something like this before, I want
to make sure I will not screw up and/or damage the tool.
(they are expensive !)

I was planning to just practice with something soft
like brass before I move on to aluminum. The dovetail
has a .5in base. I don't have a collet but I made a simple
end mill holder for it.

What is the best advice you can give me before I
turn on the switch on the Unimat?

thanks in advance,

Norm





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