generally used grinders and additional special grinders description and types of wheels of grinders.

1. GRINDINGMACHINES
FACULTY ADVISOR : NEELMANI SRIVASTAV
PREET PATEL : 170520123034
NEEL VAGHASIA : 170520123058
DHAVALAKHBARI : 170520123002

2. CONTENT
INTRODUCTION
TYPES OF GRINDERS
 PLASTIC SCRAP GRINDER
 GEAR GRINDER
 CYLINDER GRINDERS
 SURFACE GRINDER
 BENCH GRINDERS
 COMMON GRINDING WHEELS
 ADDITIONAL GRINDERS LIST

3. INTRODUCTION
• Agrindingmachine,often shortened to grinder,is anyof
various power tools or machine tools used for grinding, which is a type
of machining using an abrasive wheel as the cutting tool. Each grain of
abrasive on the wheel's surface cuts a small chip from the work piece via
sheardeformation.
• Grinding is used to finish work pieces that must show high surface
quality (e.g., low surface roughness) and high accuracy of shape and
dimension. As the accuracy in dimensions in grinding is on the order of
0.000025 mm, in most applications it tends to be a finishing operation
and removes comparatively little metal,about
0.25 to 0.50 mm depth. However, there are some roughing
applications in which grinding removes high volumes of metal
quite rapidly. Thus,grinding isadiversefield.

4. • Thegrinding machine consistsof abed with afixture to guide and holdthe
work piece, and apower-driven grinding wheel spinning at the required
speed.Thespeedis determined by the wheel’s diameter and
manufacturer’s rating. Theuser cancontrol the grinding headto travel
acrossafixed work piece,or the work piece canbe moved while thegrind
headstaysin afixed position.
• Finecontrol of the grinding heador tables position is possibleusing
avernier calibrated hand wheel, or usingthe features of numericalcontrols.
• Grinding machinesremove material from the work piece by abrasion,which
cangenerate substantial amounts of heat. Tocool the work piece sothat it
doesnot overheat and gooutside its tolerance, grinding machines
incorporate acoolant. Thecoolant alsobenefits the machinist asthe heat
generated maycauseburns. In high-precision grinding machines(most
cylindrical and surfacegrinders), the final grinding stagesare usually set up
sothat they remove about 200 nm (lessthan 1/10000 in) per pass- this
generatessolittle heat that evenwith no coolant, the temperature rise is
negligible. '

5. TYPESOFGRINDINGMACHINES
• PLASTIC SCRAP GRINDER
• GEARGRINDER
• CYLINDRICALGRINDER
• SURFACEGRINDER
• BENCH GRINDER

6. PLASTIC SCRAP GRINDERS
• Plastic scrap grinder works with 2
crusher blades inside it. Plastic scrap is
passed between crushing rollers where
it is cutted into small pieces in form of
scrap.
• Plastic scrap machine is use to scrap up
all types of plastic materials like : PP,
LD, HD, PET, PS & ABS etc.
• Plastic scrap machine works with
electric motor with gear system
connected with crusher rollers to
produce high crushing power.

7. BENCHGRINDERS
• Bench grinder, which usually has
two wheels of different grain
sizes for roughing and finishing
operations and is secured to a
workbench or floor stand. Its uses
include shaping tool bits or various
tools that need to be made or
repaired. Bench grinders are
manuallyoperated.

8. GEAR GRINDER
Gear grinder, which is usually
employed as the final machining
processwhen manufacturing ahigh-
precision gear. The primary
function of these machines is to
remove the remaining few
thousandths of an inch of material
left by other manufacturing
methods (such as gashing or
hobbling).

9. COMMONGRINDINGWHEELS

10. ADDITIONAL GRINDERS LIST
 INTERNAL GRINDER
 TOOL & CUTTER GRINDER
 ANGLE GRINDER
 JIG GRINDER
 CONCRETE GRINDER
 BELT GRINDER
 STUMP GRINDER