Taft-Peirce No. 2 Surface Grinder Grinder, Surface

THE

TAFT-PEIRCE

MANUFACTURING

CO

engineering

.,

WOONSOCKET

,

RHODE

data

ISLAND

, U. S. A .

NEW

TAFT -

PEIRCE

NO

. 2

SURFACE

Machine Tool
Bulletin
September 20, 1965

9650-2

GRINDER

Division

The

new Taft-Peirce No. 2 Precision Surface

is

a machine so advanced

of

performing the most sophisticated work

ju

stify it,
sult
Surface
concepts
li

shed for
leader
Capable
of .000010"
features a 6" x 1

carrying
coarse feeds
fine downfeeding

and

they

of several years of experimentation, the new No. 2

Grinder

with

for

of grind ing to downfeed

100

combines a host of new

the

time-proven principles which have estab-

Taft-Peirce

accuracy

and

.000020" respectivel

graduat

and

.000010"

and

that only those few shops capable

cannot

4"

afford to be

its reputation as

in

the

small surface

wor

king surface,

ions,

each

and

crossfeeding. A simple

without

and

crossfeed accuracies

y,

the new

and

representing .001"

.000020" respectively for

grinder

the

can poss

grinder

handwheels

Grinder

ibly

it.

The

re-

design

undisputed

field.

grinder

for

adjustment

of the

center

knob

on

each hanclwheel permits shifting be­tween coarse
way design
of

the

the No

The
capable
lous

attention

the

optimum

ribbing for maximum resistance to deflection,

treated
level of stability.
must

be performed

procedures
ed and

and

fine feeds.

throughout

unique tilting wheel head so long associated

. I Surface Grinder. -

desi

gn

and

of such a high degree

to every detail.

combination

with

extreme

The

under

and

the

assembly accomplished by highly skill-

dedicated

workmen.

The

and

it

includes a simplified version

construction

of

accuracy requir

The

of

massiveness

care

to assure

machining

the

strictest of

machine

of a standard

castings, designed

and

also utilizes ball

an

unusually high

finishing

qua

machine

es

scrupu~

and

scientific

must

be

operat

lity control

with

with

heat

ions

The

following

of

the

major

TABLE - This critical component acquires its

summary

reviews some of the features

components of

the

machine:

out
standing flatness retentivity from its carefully ribbed
construction

and

ground

The

smooth
through
wheel
conveniently
guard

and

from

ways

and

and

true

a steel

tape

and

on

the

saddle. Adjustable stops

at

the front area. A combination

and

lighted sighting panel

the

arrangement

of

hardened

balls on which it is supported .

table travel is controlled

drum

operated

by

are

the

located

hand-

dust

are

located

at

the
left-hand end of the table to simplify rough setting
of

the wheel to the work.

SADDLE

rigid, well-ribbed saddle casting is assured by
harden
steel ball support system.
ing
and
sates for screw
positioning of the saddle. A

- Like the table,

ed

and

grou

nd

steel vee \va

is

obtained with a precision

true

Accurate

movement

ys

and

of

precision

crossfeed position-

gro

und

lead screw

bronze nut. An anti-backlash feature compen-

wear

and

assures positive
handy

tool tray

acc

is

located

urate

the

the

conveniently on th e top surface.

COLUMN

-

The

long cast iron column

unit

, which
carries the wheel spindle, is guided vertically between
two pairs of

pi-e~lo

adcd , heavy

-duty pr

ecision ball

and

hardened

column

-

against
movement completely
curate

guiding of
controlled
and

nut

right

front
spindle block
of

the

wheel spindle to a

and

ground
support
the

bracket, which

machine pedestal, encloses

the

by

means of a precision elevating screw

operated

of

by

the

pedestal. A pivoted, counterbalance

at

the

vee ways. A massive, rigid

is

securely

and

provides full length ac-

column. Column movement

a handwheel located

top

of

the

column allows tilting

30'

angle from the horizon-

mounted

the

column

at

f

is

the

tal.

PEDESTAL

construction.
solid

support

The

lubrication system

accessible

front

of the pedestal.

HANDWI-IEELS - Balanced handwheels

cated

at

estal. Both t

-

The

heavy base casting

Its

great

for

the

saddle

through a lar

strength

and

ge

and

stability provide

and

column guide units.
a storage space
sheet metal door in

convenient positions on the saddle

he

crossfeed

and

vertical-feed

is

is

and

of

cube

readily

are

ped-

hand-

the

lo-

wheels have built-in gearing to accomplish coarse
and

fine feed movement.
by tightening
grad

uated

rings

or

loosening a center knob. Slip dial

are

The

feed change

provided to

permit

is

obtained

convenie

nt

zero settings.

Table Travel

Longitudinal - 15½
Crossfeed ­Coarse - 0.
Graduation

- .001
Fine - 0.002"
Graduation

- .000020

Wheel Head Travel

Vertical -

12

Coarse - 0.100
Graduation
Fine ­Graduation

Maximum

-

0.001'

- .0000 I 0

Tilt -30'

Spindle Motor - 1

220-440

Lubrication ­Finish -

One

Machine

Electrics - J.I.C.

Base Dimensions -

Overall ­Table
Table
Table
Work
Wheel - 7

48½"

Work

Surface - 6

Overall -

Height

Height

11

O.D.

wide x 40

48½

above floor -

under

Combination Safety
Weight - 2575 lbs.

Machine

11

, 4.147

11

6½

11

100

per revolution of handwheel

11

per division spaced

per

revolution

11

per

11

11

p

er

revolution of handwheel

11

.001

11

Tool Gray, No.

per division spaced

per

revolution of

11

per

h.p

., 3 phase, 60 cycle A.C. 3600 r.p.m. wound for

or

550, as specified

shot to all ba

Specifications

11

per

revolu tion of handwheel.

of

handwheel

division spaced

handwh

division spaced

ll

ways,

and

7B

11

3/

10

apart.

~'ir.

11

3/io

apart

eel

o/io

bearings

11

11

not

apart

apart

permanently

Standard

Dimensions

29¼

wheel -

x ½

Guard

11

wide x

11

11

x

81/a"

11

- Hole

11

deep x

x

and

11

14

40¼

12

Light-

11

1¼

25

11

11

deep

65¾

11

11

7"

high

x 9

11

x

1/a"

110 volt, 25

lubricated.

watt

bulb