size of first background pic
size of top bar picture
South-Bend-Works   (lathe makers)
Motor Mechanics Handbook No.33
second page text
A Word to the Motor Mechanic

The repairing and servicing of the automobile, bus and truck is an important and active industry in the United States, because more than 26,000,000 motor vehicles must be repaired and maintained if they are to operate ej|fideafly in transportation.
To properly handle this work the motor machine shop must have practical precision equipment. Car and truck owners are discriminating more and more in favor of the well-equipped~ shop that turns out a first class, accurate job at a reasonable price. The well-equipped shop soon becomes the best known shop in the community. `
No single piece of equipment so well enables the shop to do a wide range of accurate service work at reasonable prices and at a good profit, as the Back-Geared, Screw Cutting Lathe. This universal tool when fitted with proper attachments, will do all the service jobs which would otherwise require several single purpose machines. For ~example, one South Bend Lathe, with a few attachments, will handle the grinding of valves, boring of connecting rods, making of bushings, truing of armatures, undercut- ting of mica, finishing of pistons by turning or grinding, machining of flywheels for ring gears, cutting of screw threads, general machine work, etc.
The price of a lathe and attachments for handling gen- eral automotive service work in the motor machine shop is less than one-fourth the total price of the special machines required to do the same work. No other shop tool .is the equal of the lathe in versatility, ease of opera- tion, wide range, accuracy and economy of operation. In this handbook are illustrated and described a few of the most important motor service jobs, and the latest shop practice for handling them. South Bend Lathe Works
< The Back-Geared, Screw. Cutting Lathe is an all-round general purpose tool-the most practical tool in the equipment of the motor machine shop. The lathe is popular because it ~can take care of all jobs specified in the following list and hundreds of other jobs.
Armature Work . . . Page I O
Truing commutators Undercuttin g Mica Straightening armature shafts Cutting old wire from armatures for rewinding Making replacement bearings
AxIe Shafts . . . . . . Straightening bent axles Rechasing damaged threads Mill square or keyway in axle Making new axle shaft Brake Service . 6, 7
Truing brake drums Testing brake drums Testing wheel bearings Fit metal liner in brake drums Fitting power booster brakes to trucks and trailers Bushing Work Making bushings of all kinds Boring bronze backed babbitt lined bearings Connecting Rod Work . 8
Borin g rebabbitted con rods Boring bronze backed babbitt lined bea rings Ali gning connecting rods Reaming con rod pin bearings Screw Thread Cutting . 13 Cutting right o r left -hand screw threads Making bolts and nuts Grinding .Page 9, 24
Sharpening reamersSharpening valve seat reamers Grinding hardened bushings. Grinding pistons, valves, etc. Hub Service . . . . . . . 6, 7
Truing a bent hub flange Salvaging damaged hub by re-machining after welding Rechasing damaged threads Piston Service . . . . . . 5
Finishing round pistons Finishing cam shaped pistons Machining ring grooves Reaming piston pin bearings Reaming piston skirts Differential Service 12
.Truing differential flange Testing truenes~s of new ring gear assembly Shock Absorbers~Reconditioning worn shock absorbers Making new parts for shock absorbers Drive Shaft Servicing . Testing and straightening bent drive shafts Flywheel Work 4
Machining flywheel for new starter gear Polishing flywheel clutch face General Machine Work .
Making replacement parts Cutting screw threads Salvaging worn parts by remachining after welding Makin g tools and punches Test and straighten bent shafts Filing an~d polishing Drilling, reaming, tapping, etc. Wheel Service . . 6, 7
Boring wheel for hub Salvaging wheels with worn bolt holes by re-machining after building up by welding

Milling and Keyway Cutting . . 26 Milling a straight keywa y Milling a Woodruff keyway Squaring end of a shat t Milling a dovetail Milling aquares, hexagons Valve Service Work . . . 9 Refacing valves Straightening valve stems Making a valve guide bushing Grinding end of valve stem for clearance adjustment Grinding tappets and tappet adjusting screws Sharpening valve seat reamer Making valve seat rings Automotive Service Laboratory

In the Plant of the South Bend Lathe Works, South Bend, Indiana The Automotive Service Laboratory of Here our expert mechanics develop practice South Bend Lathe Works, started in tical and modern automotive maintenance {920, occupies a room 6Ox1OO feet. Lathes methods, some of which are illustrated in in various sizes and types, Countershaft this handbook.
Drive and Motor D.rive, .fitted with attach- With each South Bend Lathe sold for repair operations. step-by-step the major maintenance jobs. In addition to these instructlons, any motor machine shop purchasing a South Bend Lathe may send a mechanic to our service laboratory where he may become familiar with operating the lathe on various service jobs,free of charge. One or two days is the averagetime spent here. Our laboratory is always open to the public and we have had visiting mechanics from e v e r y
Fig. 1. Automotive Service Laboratory of South Bend Lathe Works state and many countries.

second pic background
second pic
Fig. 5. Close-up Showing a Piston Being Machined in the 13-inch South Bend Lathe

Fig. 2. Machining a Flywheel for a Steel Starter Gear in the 16" x 8' South Bend Lathe

Machining Flywheels
For machining flywheels for steel starter gears,truing the clutch face, and handling other fly-
wheel servicing operations, we recommend the16" x 8' South Bend Lathe as listed in the
No. 16 Shop Equipment on page 14. The South Bend method of mounting flywheels, as shown
in Fig. 3, is efficient and accurate and insures that the machined surface of the flywheel will
run true with the axis of the crankshaft. Fly-wheel servicing can also be done on the 18-inch
and #36-inch lathes.

for Steel Starter Gears
Tf e time required to machine a flywheel in the lathe and fit it with a new steel starter gear
is from 20 to 30 minutes. For prices of fly- wheel servicing equipment, see page 27.
In addition to servicing flywheels, the 16-inch lathe is practical for truing brake drums of de-
mountable wheels, servicing crankshafts, driveshafts and axles, pistons, connecting rods, dif -
differentials, valves, bushings, armaratures , cut tin gib screw threads, for general machine and repair
work, and hundreds of other jobs.

"How to Service Flywheels"-Bulletin No. 3
Th e motor mechanics interested in handling flywheel work should have a copy of this 8-page bulletin, size 81[2xl I inches, for
reference becauseit shows the most practical and efficient method for doing this import-ant work. The bulletin contains more than
thirty illustrations show-ing how to mount a flywheel in the lathe for removing damaged teeth;
machining the flange for starter ring gear, and many other jobs.
Bulletin Mailed Anywhere in the World, Postpaid, No Charge

-How  to  mount  flywheel  in  lathe.    --How  to  test  concentricity  of  hole.
--How  to  fit  ring  gear  on  flywheel. &n;   -How  to  make  bolt  circle  on  flywheel.
-How  to  true  and   polish  a  clutch  face.      ;-How  to  out  keysejat  in  flywheel.
--How  to  balance  a  flywheel.    &nb&nbsTime  relquired &do  the  job.
--How  to~ bore  flywheels  accurately.        --Flywheel  servicing  equipment.

Finishing Semi-Machined Pistons in the Lathe
Semi-machined pistons, solid or split skirt A set of six 3-inch .080" oversize pistons, types, made of cast iron, aluminum, or other
round or cam shaped, can be finished in the alloys, can be quickly and accurately machined South Bend Lathe in about thirty the South Bend Lathe to fit the cylinder The lathe is also practical for reaming pis-blocks of all automobiles, buses,
trucks, true- ton skirts, many other piston servicing operators, aero engines, etc. Lions, servicing armatures, bushings, connecting
Turning pistons in the lathe (the method used rods, valves, cutting screw threads, and for gen-by piston manufacturers) is the best
practice eral machine work. and the most practical way to do the work, as Piston servicing can be done on the 11-inch,
and ', 6-inch lathes, as listed in the Shop ts on pages 14 and 15~

Cam Shaped Pistons Cam shaped, elliptical or out-of-round pistons can be
machined in the South Bend Lathe by using the cam forming attachment. Figs.
6 and 7 show two drawings of a cam piston. Pistons are machined cam shaped so
as to permit clearance along the two sides of piston ad-
jacent to the piston pin hole as indicated by E and E' in Fig. 7. Cam shaped pis-
tons, when hot and in op- eration in the cylinder, ex- pand to a perfect round.
Cam pistons may be fitted much closer in the cylinder than round pistons.


Fig.   7.    Drawing   Showing   Shape of   Cam  Piston  in  Cylinder When  Cold

"How  to   Finish   Pistons"-Bulletin  No.  9
Shops  already  handling  piston  finishing  and  those  intending  to  go  into this  work  will  find  this  8-page  bulletin,  81[2xll   
inches,  a  valuable  refer-~ ence  booklet.    Bulletin  No.  9  shows. how  to  finish  round  pistons  and  also
how  to  finish   oval  or  cam   shaped   pistons  according  to  the  latest  and most  accurate  method.    Large  illustrations  show  
how  to  do  the  various piston  servicing  operations,  a  few  of  which  are  listed  below.
Bulletin  Mailed  Anywhere  in  the  World,  Postpaid,  No  Charge

--How  to  finish  round 'pistons.                                 -How  to  machine  lands  of  piston.
--How  to  finish  cam  shaped  pistons. p;      -How bsp;grooves.
-How  to  mount  pistons  in  the  lathe. sp;         -How  to  drill  center  hole  in  piston.
--How  to  reanl  skirt  of  piston. nbsp; p;  p;-How  to  make  wrist  pins.
-How  to  ream  wrist  pin  hole. sp;        &nbp;-Piston   servicing  equipment.
first page text
Guarantee of Lathe
, South Bend Lathe to be accurate and the satisfaction and the service you have 'a rig,e, anywhere in the United States any I
I or workmanship, within one year from Bend Lathe anywhere in the United p. If~ you are dissatisfied in any way,.
ill~ pay ~ the return freight charges and

Factory of South Bend 'Lathe Works
Established in 1906; for nore than 27 years . Builders of 96 sizes and types of 5 South Bend Back-Geared,
5crew Cutting Lathes of nhich more than 55,000 Bite in use in the U. S. and 39 other countries.
We invite you to visit our factory and display room
whare ever you are in this vicinity. Visitors are always welcome.

back cover
.General Catalog No. 94

,On South Bend Lathes, Attachments and Tools
Our New General Catalog No. 94 illustrates, describes, and prices
the entire line of , New Model South Bend Back-Gea red, Screw Cutting
Lathes, f rem 9 -inch swim g to 3 6 - inch swin g, and in bed Jen gths 2 1/2 -
foot to I 4-~foot, countershaf t and motor drive. At tachments, chucks,
tools, and accesso fies f or use on each' size South Bend Lathe are
also illustrated, described and priced.
Mailed Anywhere in the World, Postpaid, No Charge

Quick Change Gear Lathes Gap Bed Lathes
Standard Cflange Gear Lathes Brake Drum Lathes
Underneath Belt Motor Driven Lathes Oil Pan Lathe's
Tool Room Precision Lathes Lathes for Export
Size 8 1/8xlO3/4~ Inches, ~ 72 ~ leorpzton~alo~o~r~ Srlve~ heL$athes ~~~~~~ts^f"to~~tiveomo~ ~kWork
Pa ges, `250 Illus trations J unior Bench and F loor Leg Lathes Attach meats for Special Work -

Factory of South Bend Lathe Works
Established in 1906; for more than 27 years build. ers of 96 sizes and types of South Bend Back-Geared, Screw Cutting Lathes of which more than 55,000 are in use in the U. S. and 89 other countries. We in- vite you to visit our fac- tory and display r o o m whenever you are in this vicinity. Visitors are al- ways welcome. -.-. . . . .

(Filling in this blank places rue under no obligation whatever)

335 E. Madison St., South Bend, Indiana.
Date-. Gentlemen: I am interested in information on the following: Check Motor Machine Shop Equiprnents in Which You Are Interested ~No. 16 Equipment ~ No. 13 Equipment ~ No. 9 Equipment ~ No. 36 Equipn Size and Type of Lathe Wanted: Swing_....___..............,~-inches; Length of Bed...-.......-...-feet Type of Drive Wanted..-...-,-.-..-,-,-.-,-...-...-,-.-.- Check Classes of Work You Plan to Do-Service Bulletins will be mailed. postpaid, no chf ~Flywheels ~ Brake Drums ~ Valves ~ Bushings ~ General Mac ~Pistons ~ Connecting Rods ~ Armatures ~ Differentials and Repair ~ Check Method of Payment Preferred: ~ Cash with Order ~ Easy Payment Plan Name-,-,-.-~-_.-..-....-...-..-..-..-,..-~~-.-.-...-...- Street Number-..-..-..-,-....-_-.-_-,-_-,-_-..-'-.-,-
33-7th Ed.
.General Catalog No. 94

Back cover br soft>
size of fourth background pic
OCR 4 picture
Fig. 8. 36" x 8' Motor Driven Quick Change Gear Brake Drum Lathe, $938.00

Fig. 8. 36" x 8' Motor Driven Quick Change Gear Brake Drum Lathe, $938.00 36-inch South Bend Brake Drum Lathe For Truing Brake Drums, Machining Auto Wheels, and for General Machine Work The 36" x 8' Brake Drum Silent Chain Motor Driven Back-Geared, Screw Cutting Lathe, illus-trated above and on page 1 7, will swing all types of wheels (including drums attached to axles), both single and dual, including wire, disc and artillery types, with tires attached, up to 3 6 1,/, inches in diameter; and will machine all brake drums up to 23 1/2 inches in diameter. Time required to true a 2-inch drum is 10 minutes. For prices of brake drum equipment, see page 27. The Brake Drum Lathe is also practical for machining flywheels, differentials, hubs, drive shafts, ax 1 e s , pistons, armatures, bushings, valves, cutting screw threads, and general work. Regular Equipment, as shown under lathe in illustration above, is included in price of lathe. Electrical Equipment included in price of lathe consists of: Silent Chain motor drive unit, 1 H.P. instant reversing motor, drum reversing switch, wiring between motor and switch, flexi-ble metal conduit, belting and wiring diagram. List of Users. There are hundreds of South Bend Brake Drum Lathes in use in Brake and Wheel Service Stations, Auto Parts Jobbers Shops, Tire Shops, and Super-Service Stations. We shall be glad to send you, free on request, a list of these users so that you may visit their shops and inspect their South Bend Brake Drum Lathes. Prices 36-inch South Bend Bend Brake Drum Lathe-Silent Chain Motor Drive Swings Wheel Tire Attached Inches Length of Bed Feet Distance Between Centers Inches Power fteguired H.P. Approx. Weight Crated Pounds Standard Change Gear Lathes Quick Change Gear Lathes Cat. No. 3-Phase 60-Cycle A.C. Motor 1-Phase 60-Cycle A.C. Motor Direct Current Motor Cat. No. 3-Phase 60-Cycle A.C. Motor 1-Phase 60-Cycle A.C. Motor Direct Current Motor 361/4 361/4 361/4 361/4 6 8 10 12* 27 51 75 99 1 1 2620 2780 2940 3100 302-BC 302-BE 302-BG 302-BH $836.00 878.00 924.00 989.00 $870.00 912.00 958.00 1023.00 $918.00 960.00 1006.00 1071.00 304-BC 304-BE 3C4-BG 304-BH $896.00 938.00 984.00 1049.00 $930.00 972.00 1018.00 1083.00 $978.00 1020.00 1066.00 1131.00 -Includes Center Leg. For Countershaft Drive, deduct from 3 -phase price, $1 8 6.0 0. Fig. 9. Truing a 17-inch Brake Drum, in the Lathe, Without Removing the Tire A Fig. 10. Truing a Chevrolet Brake Drum with Hub and Axle Attached Buick, Pontiac and similar brake drums can be machined in the 3 6-inch or 1 6-inch Lathe. The brake drum flange is held in the chuck and the axle is supported on the tailstock center.

pg7___________+++++++++++++++++++++==========================-------------------------_________________ Self-Centering Mandrel and Universal Adapter Method For Accurately Mount-ing Wheels Between Lathe Centers for Test-ing, Truing and Ma-chining Brake Drums The wheels of automo-biles, buses and trucks having Timken or Ball bearings are mounted be-tween centers in the lathe on a Straight Mandrel with. Universal Adapters. The Universal Bearing Adapters by their accurate contact with the bearing cups line up the entire wheel so that all machin-ing done on the felloe or brake drum will be per-fectly true and concentric with the axis of the hub. • OUTER RACE CUP OUTER UNIVERSAL -ADAPTER INNER - UNIVERSAL ADAPTER Fig. 12. Wheel Mounted on Straight Mandrel and Universal Adapters Self•Centering Universal Taper Mandrel Method For Mounting Rear Wheels in Lathe The rear wheels of auto-mobiles, buses and trucks, having semi-floating axles, are mounted on self-center-ing Taper Mandrels for testing, truing and machin-ing brake drums. The taper of mandrel and taper in hole of hub cor-respond, therefore t h e wheel is accurately and concentrically mounted when it is tight in any position on the taper of the mandrel. One mandrel will fit from one to twenty makes of wheels. Mandrels can be purchased, or made in the lathe. Fig. 13. Rear Wheel Mounted on a Self-Centering Taper Mandrel Fig. 14. Mandrel and Adapter Assortment for Mounting Wheels Between Centers in the Lathe General Mandrel and Adapter Assortment No 6 The assortment illustrated above consists of mandrel and adapter assortment will handle about one straight mandrel and ten bearing adapters 85 % of all wheels for passenger cars, light buses for mounting front wheels and eight taper man- and light trucks. drels for mounting rear wheels. This general Price of assortment ....... ..... .$74 00 Brake Drum Bulletin No. 4 This 16-page Bulletin, 81/9x1 1 inches, fully illustrated, is a valuable ref-erence book for the brake and wheel service shop. It contains complete information on the latest precision methods of truing the brake drums of wheels of all types, single and dual; also complete details on the South Bend Self-Centering Mandrel and Adapter Method for mounting wheels and hubs. Complete equipment for the work is also listed. ,4), ri()W to"Prue Brake 1)rtirtis Ing Btafs, Drum Mailed Anywhere in the World, Postpaid, No Charge PARTIAL LIST OF CONTENTS Truing Front Wheel Drums Truing Rear Wheel Drums Truing Drum with Axle Attached Self-Centering Mandrels Universal Bearing Adapters 7 List of Mandrels and Adapters for all automobiles, buses and trucks Brake Drum Machining Time Brake Drum Utility Jobs Balancing Wheels