Steel Balls

Steel balls are spherical components used as rolling mechanisms in rotary motion components such as bearings, tooling, wheels, but there are other use for steel balls such as grinding or burnishing media, toys and more. There are many sizes and gauges used in a variety of applications.

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Selecting the Right Steel Ball

When sourcing steel balls, consider your application and the function you need the ball to perform. Various options are available when creating steel balls and bearing balls, so you will need to consider the size and materials.

• Steel balls are available in standard and metric sizes, so determine which is most appropriate for your purpose. Standard-sized steel balls are typically less expensive and normally available for immediate delivery. However, STR Industries will design custom sizes upon request.
• Material choice dictates the physical characteristics of the steel ball, such as hardness, magnetic properties, and oxidation resistance. Steel balls are available in low carbon (, ), high carbon (,), chrome (), and stainless steel (302, 304, 316, 420, and 440). The intended application will play a significant role in determining the appropriate material choice.

How Steel Balls are Made

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Our engineers can provide guidance in selecting the right type of steel balls for your application, including size, materials, and quantities.
Stainless steel and other metal balls are manufactured using the following processes:

• Forging aka cold heading. Rough ball shapes are forged from bar stock material.
• Deflashing. Rough machining or soft grinding removes the forge flashing.
• Heat treatment. Balls are heat treated based on technical specifications in a controlled process.
• Finishing. Stainless steel balls skip this step. Other steel balls may be hardened using heat treatments, quenching, or other tempering methods.
• Hard Grinding. The steel balls are ground to remove nicks and imperfections.
• Lapping. A controlled mechanical sanding/polishing process brings the balls into the intended design, grade dimensions, and spherical accuracy within 1/1,000,000 of an inch.
• Inspection & Packaging. Lubricant or rust-preventive is applied as a final step before the steel balls are inspected and packaged.

Applications for Steel Balls

Steel balls have hundreds of potential uses. Some of the most common applications include:

• Automotive
• Bearings (most common)
• Casters
• Ink/chemicals as grinding media
• Military
• Paint
• Pharmaceuticals
• Rollers
• Sliders
• Sports Equipment
• Toys

 

 

Carbon Steel Ball

Material Available

• Low Carbon: AISI ~ AISI
• Medium Carbon: AISI
• High Carbon: AISI ~ AISI

AISI NumberC %Si %Mn %Mo %P % S % Hardness AISI 0.10 Max0.30 Max0.50 Max0..07 Max 0.06 Max Case Hardened
HRC 55Min AISI .13~0.180.10~0.300.30~0.600.020.04maxCase Hardened
HRC 55~61 AISI .43~0.500.10~0.30 0.60~0.900..04 Max0.05 MaxThrough Hardened
HRC 60 Min AISI .83~0.880.10~0.30 0.30~0.700.040.04 Max0.04 MaxThrough Hardened
HRC 60 Min

Chemical Composition

Grade

3 ~

Size

1.0mm~ 2&#;

Application

Casters, bicycle parts, light-duty bearing, hardware, toy and etc.

 

 

Chrome Steel Ball

C %Si %Mn %Cr %Cu %S %P % 0.90~1.05 0.15~0.35 0.25~0.45 1.35~1.65 0.3 Max 0.03 Max 0.03 Max

Chemical Composition

Density

7.84 g/cm3

Hardness

Through hardened, HRC 60 Min. Grade
5~ grade

Size

0.5mm~5&#;

Application

Bearing, Ball Screw, Linear motion guide, Automotive parts, Chemical, food processing.

 

 

Stainless Steel Ball

Material Available

• AISI 302~AISI 316
• AISI 420~AISI 440C

AISI
NumberC %Si %Mn %Cr %Ni %Mo %P %S %Character AISI .15 Max1.00 Max 2.00 Max17.0~ 19.08.0~ 10.5 0.045 Max0.03 MaxSlightly
magnetic
Austenitic AISI .07 Max1.00 Max2.00 Max17.0~ 19.08.50~ 10.50.045 Max0.03 MaxSlightly
magnetic
Austenitic AISI .07 Max1.00 Max2.00 Max16.5~ 18.5 10.5~ 13.~ 2.500.045 Max0.03 MaxNonmagnetic
Austenitic
Excellent corrosion
resistance AISI 420J0.17~ 0.251.00 Max1.00 Max 12.0~ 14.00.045 Max 0.03 MaxMagnetic
Hardenable HRC
48 Min fair
corrosion
resistance AISI .08 max1.00 Max1.00 Max15.5~ 17.50.045 Max0.03 MaxFair- good
corrosion
resistance
AISI 440C0.95~ 1.201.00 Max1.00 Max 16.0~ 18.00.40~ 0.800.04 Max0.02 MaxFair corrosion
resistance
Hardenable HRC
58 Min

Chemical Composition

Grade

10~

Size

0.5mm~2&#;

Application

Dispenser valve ball, stainless steel bearing, chemical related application

Fractional Listed by Size/Steel Sheilds & New Teflon® Sheilds

d

D

B

Application

Order No.

1/8

1/4

.110 (7/64)

, 1/4" diameter trim bits.

1/8

3/8

.155 (5/32)

, , , smaller cove bits, several types of form bits, and old style 3/8" diameter trim bits, new 'no-file' trim bits.

1/8

1/2

.171 (11/64)

Old style 1/2" diameter flush trim bits.

3/16

3/8

.124 (1/8)

3/8" diameter flush trim, all beading bits, (/), , , , , , many types of form bits.

3/16

1/2

.195 (3/16)

Our most popular bearing. Fits 1/2" diameter flush trim, some bevel trim, all corner rounds, raised panel, rabbet, ovolo, many types of form bits and , , , , & new style & (after 12/95).

3/16

1/2

.195 (3/16)

*With Teflon¨ dust shields-used as a substitute for .

-HP

3/16

.492

.195 (3/16)

New undersized 1/2" diameter bearing for use after resharpening. Fits all tools such as flush trims, corner rounds, etc., that use the standard bearing.

3/16

5/8

.195 (3/16)

The company is the world’s best Steel Ball Manufacturer supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

'Overhang' bits, , (/).

3/16

3/4

.280 (9/32)

(/), , , RC-.

3/16

7/8

.196 (3/16)

, for 1/4" rabbet.

1/4

1/2

.186 (3/16)

, , , , , , , , RC-.

1/4

1/2

.195 (3/16)

*With Teflon¨ dust shields-used as a substitute for .

*-HP

1/4

5/8

.195 (3/16)

, , , , , , , , , , , , , , , , , , , , , , , 'RC' series bevel trim bits.

1/4

5/8

.280 (9/32)

*With Teflon¨ dust shields-used as a substitute for .

*-HP

1/4

3/4

.275 (9/32)

, , , , , , , , , , and old style , .

1/4

1

.344 (11/32)

.

5/16

.865 (7/8

.275 (9/32)

1/2" depth of cut slotting assemblies, all stile & rail, , , , , .

1/2

1-1/4

---

New raised panel with back cutter , , .

1/2

1.319 (1-5/16)

.335 (21/64)

, , .

1/2

3/4

.156 (5/32)

, , .

1/2

1-1/8

.312 (5/16)

, , , , and old style & (prior to 6/95). For new style & (after 6/95) use Ultra-Glide&#; #.

1/2

1

5.7mm

1/2

1-1/4

5.7mm

1/2

1-1/2

1/2

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