Specifications

33
1-800-543-7586
Adapter Assembly
attaches firmly to the
quill for sturdiness
Internal Mechanisms
allow for 100–700 rpm
at Speed Reducer
output spindle
Cast Aluminum
Housing for quality
and durability
Tapered Spindle
Flat for added
safety
THE NEED FOR (the correct) SPEED
Achieving professional-looking results often
depends on having the right tools for a particu-
lar job. And, operating those tools at the opti-
mal speed is as important as having them.
Your MARK V gives you a wide range of
speeds to handle most jobs at the twist of a
Dial. However, occasionally, you need a speed
that’s either faster or slower than your MARK V
can deliver without a little help.
That’s where the Shopsmith Speed Increaser
and Reducer will step in to deliver speeds that
are either slow enough for oversized turn-
ings and drill bits ... or fast enough for certain
Routing or Shaping operations. (See Table)
* The Speed Increaser is designed to deliver 10,000 rpms with
the MARK V Speed Dial set at “V,” and is not intended for use
at other Speed Dial settings.
Table of MARK V Speeds using Increaser and Reducer
Speed
Dial Mark V With With
Setting Speed Increaser Reducer
SLOW 700 — 100
A 750 — 107
B 850 — 121
C 950 — 136
D 1,050 — 150
E 1,150 — 164
F 1,300 — 186
G 1,450 — 207
H 1,600 — 229
I 1,750 — 250
J 1,900 — 271
K 2,050 — 293
L 2,200 — 314
Speed
Dial Mark V With With
Setting Speed Increaser Reducer
M 2,400 — 343
N 2,600 — 371
O 2,800 — 400
P 3,000 — 429
Q 3,250 — 464
R 3,500 — 500
S 3,800 — 543
T 4,100 — 586
U 4,400 — 629
V 4,700 10,000 * 671
W 5,100 — 729
FAST 5,200 — 743
The Shopsmith Speed Reducer provides your
MARK V with a 7:1 ratio of speed reduction
(see Table below). So, instead of your standard
700 to 5,200 rpms, you’ll be operating at 100
to 743 rpms.
This will allow you to perform an even wider
variety of operations while increasing your ability
to achieve the kinds of results you want.
For example, with your MARK V set on “SLOW”
(700 rpms), the Output Spindle of your Speed
Reducer will actually be turning at just 100 rpms.
Then, as you turn up your MARK V’s Speed
Dial, your low-end speeds increase accordingly ...
all the way up to a maximum speed of 743 rpms
when you reach the “FAST” setting.
A few tasks that will be made easier
for you with the Shopsmith Speed
Reducer:
• Cut, drill, sand or grind metals and plastics
with the MARK V or Special Purpose Tools.
• Bore large diameter holes in hard woods
without burning your bits.
• Create heavy and/or oversized Faceplate
turnings on the Lathe.
• Eliminate burn marks when sanding with
the Disc or Drum Sander.
KEY FEATURES
• 3-point clamping (at Quill and around Way
Tubes) provides stability.
• Double Poly-V Belt Drive system is positive
in its action and designed to last.
• Reverse tapered Spindle flat helps keep tool
from slipping off if loose.
• Rugged, cast aluminum Housing delivers
rugged durability.
555428
Shopsmith Speed
$297.85
Reducer
Shopsmith Speed Reducer
Reduce your MARK V’s speed to 100 rpms for Turning, Drilling,
Sanding and more – with the Shopsmith Speed Reducer