BURNISHING MEDIA

Steel ball burnishing media because of their spherical shape and excellent rolling action impart terrific luster, close to buffing, on metal components in mass finishing equipment - tumblers, barrels, harperizers, magnetic polishers, centrifugal and vibratory finishing machines. However, because of their shape, steel balls cannot access grooves, corners, collars and intricate profiles. To overcome this problem, steel burnishing satellites, Double-cones, Double Disc diagonals and pins are mixed with the steel balls in the burnishing media to achieve uniform cleaning, metal finishing and mirror finish all over the component profile.

Satellites & Doubl-econes

Satellites, Double-Cones, Double Disc Sizes

& High Carbon High Chrome Steel and Stainless Steel

CORE DIA x RING DIA
(a) (b)

MM INCHES

3 x 5 -

3.18 x 4.76 1/8" x 3/16"

4.76 x 7.14 3/16" x 9/32"

5 x 7 -

6.35 x 7.94 1/4" x 5/16"

Pins Diagonals

High Carbon High Chrome Steel Stainless Steel

DIA x LENGTH

MM INCHES

0.5 x 6.0 -

0.8 x 6.0 -

1.0 x 10.0 -

1.19 x 9.53 3/64" x 3/8"

1.50 x 10.0 -

1.59 x 9.53 1/16" x 3/8"

2.0 x 6.0 -

2.38 x 6.35 3/32" x 1/4"

3.0 x 8.0 -

3.18 x 7.94 1/8" x 5/16"

~ Length denotes total end to end length.
~ Ends are generally beveled and cut at an angle of 45°(except for 0.5, 0.8 mm).

DIFFERENT GRADES FOR STAINLESS STEEL BALLS

SPECIFICATIONS	EQUIVALENTS	HARDNESS	AVAILABLE GRADES	PROPERTIES
AISI 420 C	W.1. 4034 AFN. Z 40 C 13 B.S. 420 S 45 DIN X 40 Cr 13	35 HRC	10 & Above	420 C balls offer good hardness & surface finish. They are generally used for all applications requiring corrosion resistance to water. Steam water, air, gasoline. Not recommended for applications requiring resistance to most chemical solutions.
AISI 440 C	W. 1.4125 AFN. Z 100 CD 17 DI.X 105 Cr. M0 17	58 To 65 HRC	10 & Above	440 C balls afford the advantage of maximum hardness combined with corrosion- resistance properties. The hardness together with accuracy and fine surface finish, makes them especially used for both bearing & valve application & other severe applications.
AISI 302	W. 1.4319 AFN Z 10 CN 1809 B.S. 302 S25 DIN X 12 Cr Ni 18 .8	25-39 HRC OR 140-160 HB	48 & Above	Austenistic unhardened stainless steel balls with excellent toughness and resistance to corrosion by such agents as oxidizing solutions, most organic chemicals, food stuffs and sterilizing solutions. They have non-magnetic properties.
AISI 304	W 1.4301 AFN. Z 6 CN 18.09 B.S. 304 S 15 DIN X Cr Ni 189	25-39 HRC OR 140-160 HB	48 & Above	As above but with Lower carbon content.
AISI 316	W. 1.440 AFN Z 6 CN D 1711 B.S. 316 S 16 DIN X Cr Ni Mo 1810	25-39 HRC OR 140-160 HB	24 & Above	Austenitic unhardened stainless steel balls as above but with increased nickel and addition of molybdenum. This is giving much better corrosion resistance to strong acids (sulfuric, phosphoric & acetic). Can be used to elevated temperatures.
AISI 316-L	W. 1.4404 AFN Z 2 CN 1712 B.S. 316 S12	25-39 HRC OR 140-160 HB	48 & Above	As above but with lower carbon content and increased nickel.

HCHC Balls

TENSILE STRENGTH	228 kgf/mm²
MODULUS OF ELASTICITY	20750 kgf/mm²
SPECIFIC WEIGHT	7.83 kgf/cm³
HARDNESS	BETWEEN 58-65 HRC ( measured on parrel flats)

DIFFERENT GRADES FOR STAINLESS STEEL BALLS

SPECIFICATIONS EQUIVALENTS COMPOSITION %

C

Si

Mn

P

S

Cr

Mo

Ni

AISI 420 C

W.1. 4034 AFN. Z 40 C 13 B.S. 420 S 45 DIN X 40 Cr 13

0.40 To 0.50

1.00 max

1.00 max

.045 max

.030 max

12.0 To 14.0

-

-

AISI 440 C

W. 1.4125 AFN. Z 100 CD 17 DI.X 105 Cr. M0 17

0.95 To 1.20

1.00 max

1.00 max

0.045 max

0.03 max

16.0 To 18.0

0.4 To 0.8

-

AISI 302

W. 1.4319 AFN Z 10 CN 1809 B.S. 302 S25 DIN X 12 Cr Ni 18 .8

0.12
max

0.2 To 1.00

0.5 To 2.0

0.045 max

0.03 max

17.0 To 19.0

8.0 To 11.0

-

AISI 304

W 1.4301 AFN. Z 6 CN 18.09 B.S. 304 S 15 DIN X Cr Ni 189

0.07
max

1.00 max

2.0 max

.045 max

0.03 max

17.0 To 20.0

-

8.50 To 10.5

AISI 316

W. 1.440 AFN Z 6 CN D 1711 B.S. 316 S 16 DIN X Cr Ni Mo 1810

0.07 max

1.00
max

2.00 max

0.045 max

0.03 max

16.5 To 18.5

2.00 To 2.5

10.5 To 13.5

AISI 316-L

W. 1.4404 AFN Z 2 CN 1712 B.S. 316 S12

0.03
max

0.20 To 1.00

0.50 To 2.00

045 max

0.03 max

16.5 To 18.5

2.25To 14.0

10.0 To 14.0

HCHC Balls

COMPONENT	C	Si	Mn	P	S
CONTENT (%)	0.11-0.20	0.15-0.35	0.5 MAX	0.025 MAX	0.025 MAX

(also known as High Carbon Chrome Steel)

STAINLESS STEEL BALLS

DSP-BALLS: PRODUCTION LINES OF PRECISION BALLS

Production lines for Precision Balls are stream-lined with optimum combinations of various processes. The process given below illustrate how the high Quality of Stainless Steel balls are achieved

Raw Material

Is thoroughly inspected for Physical & Chemicals properties .

Heading

Wire coils are cold forged into spherical blanks, for compact structure, in semi-automatic machines known as single stroke Headers.

Flashing / Filing

Die-marks on poles and equator of headed blanks are then removed by grinding them between hardened plates of special composition, known as Flashing / Filing.

Lapping

Balls are lapped for final parameters of size, sphericity , lot variation and to surface quality in a series of specially designed machines known as Lappers.

Cleaning

Balls are then prepared for macro inspection by thorough cleaning in a especially designed cleaning machine.

Macro Inspection

Whole production of DSP-BALLS goes through 100 % inspection by well trained inspectors, under suitable magnification and light, for all surface defects.

Super finishing

Balls passed through macro inspection goes under super finishing and all Specified parameters are maintained in required tolerances as per grade to be prepared .

Guarantee Test

During production balls are inspected at every stage for fixed stage specifications, and the material is unloaded from the machines only on qualifying limits. Finally, during super finishing, parameters of geometry, lot variation and surface roughness etc. are re-ensured and detailed inspection report is prepared and supplied to the customer on demand.

Packing

They are then double packed in polythene bags, before being packed in Cardboard boxes and wooden cases. Labels carrying details of sizes, quality are properly pasted..

Cargo to Export

Balls so packed are ready for Export to customers.

HCHC Balls

DSP-BALLS: PRODUCTION LINES OF PRECISION BALLS

Production lines for Precision Balls are stream-lined with optimum combinations of various processes. The process given below illustrate how the high Quality of High Carbon High Chrome Steel balls are achieved

Raw Material

Is thoroughly inspected for Physical & Chemicals properties .

Heading

Wire coils are cold forged into spherical blanks, for compact structure, in semi-automatic machines known as single stroke Headers.

Flashing / Filing

Die-marks on poles and equator of headed blanks are then removed by grinding them between hardened plates of special composition, known as Flashing / Filing.

Heat Treatment

Balls are heated in controlled environment to critical temperatures & quenched to attain due hardness. Balls are then tempered to close limits.

Grinding

Balls are ground to close tolerances in special machines with different grades of abrasives for final lapping processes.

Lapping

Balls are lapped for final parameters of size, sphericity , lot variation and to surface quality in a series of specially designed machines known as Lappers.

Cleaning

Balls are then prepared for macro inspection by thorough cleaning in a especially designed cleaning machine.

Macro Inspection

Whole production of DSP-BALLS goes through 100 % inspection by well trained inspectors, under suitable magnification and light, for all surface defects.

Super finishing

Balls passed through macro inspection goes under super finishing and all Specified parameters are maintained in required tolerances as per grade to be prepared .

Guarantee Test

Packing

Rust Prevention Oil is applied on the balls . They are then double packed in polythene bags, before being packed in Cardboard boxes and wooden cases. Labels carrying details of sizes, quality are properly pasted.

Cargo to Export

Balls so packed are ready for Export to customers.

CORE DIA x RING DIA (a) (b)
MM	INCHES
3 x 5	-
3.18 x 4.76	1/8" x 3/16"
4.76 x 7.14	3/16" x 9/32"
5 x 7	-
6.35 x 7.94	1/4" x 5/16"

DIA x LENGTH
MM	INCHES
0.5 x 6.0	-
0.8 x 6.0	-
1.0 x 10.0	-
1.19 x 9.53	3/64" x 3/8"
1.50 x 10.0	-
1.59 x 9.53	1/16" x 3/8"
2.0 x 6.0	-
2.38 x 6.35	3/32" x 1/4"
3.0 x 8.0	-
3.18 x 7.94	1/8" x 5/16"
~ Length denotes total end to end length. ~ Ends are generally beveled and cut at an angle of 45°(except for 0.5, 0.8 mm).