Hoover - Titanium Carbide (TiC) Balls

Manufacturer of Precision Balls & Rollers

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TiC Balls: Available Grades and Sizes
Grade	Size Range in Inches
3 - 10	.03937 - 1/4

Titanium Carbide Coated - Type 440 CVM Balls (TiC) Download Product Sheet

TiC balls are manufactured and finished by Hoover Precision Products, Inc. utilizing a high volume, efficient production process. The balls are coated in Safety Harbor, Florida by BryCoat, Inc. using a titanium carbide coating applied in a high temperature CVD process.

TiC technology is over 30 years old and has been developed to support many navigation, space and medical bearing applications.

TiC coatings on stainless steel balls have been demonstrated to improve conventionally lubricated instrumental bearing performance and life cycles. This performance is due to extraordinary adhesion between ball and coating, high coating hardness, low surface roughness, no microwelding between balls and races, good wettability, low coefficient of friction and low catalytic activity in the decomposition of lubricants.


	Material Analysis of Coating Material: All sizes and grades are coated by Chemical Vapor Disposition (CVD) per the CSEM Proprietary Process. The minimum coating before lap is .000180. TiC coating has a high hardness of 3500 Hv, a very fine microstruture with a grain size of .1um and is single phase with no binder.

Material	AISI	Federal	ASTM	UNS	AMS	Military & Gov’t Stds.
VAC Melt Stainless	440C FED STD66b	QQ-S-763 QQ-S-624b	MIL-S-862 MIL-S 980A (-1)	S44004	56480 7445(400c)	MS 19060

Chemical Analysis:
TiC...........................................	100%
Titanium...................................	81% by weight
Carbide.....................................	19% by weight

How do TiC Balls compare with other ball materials?
Property	Units	Steel	SI₃N₄	TiC	Tic Coated Steel
Density	-	7.8	3.3	4.92	78	Bulk properties of steel
E-Molecule	MPa	210	320	450	210
Bending strength	MPa	450	1200	900	450
Bulk hardness	GPa	7	20	30	7
Thermal expansion	10⁶/K	12	3	7	12
Surface hardness	GPa	7	20	30	30	Surface properties of TiC
Surface roughness (Ra)	nm	10	5-7	3-5	3-6
Frict. coeff./steel	-	0.7	0.6	0.25	0.25
The characteristics of TiC Balls are related to an optimized combination of steel and TiC properties.


	TiC Applications Long life inertial navigation instruments Momentum wheels Space mechanisms and instruments Mirror scanners Low noise/vibration applications Medical applications

	Advantages of Titanium Carbide Coated balls Extended bearing life Minimized adhesion and fretting wear Reduced race wear Reduced cage (retainer) wear Extends life of lburicant and also has high tolerance towards all types of lubes: chemical inertia of coating Low coefficient of friction (3 x’s lower than steel) Works in low lubrication conditions Excellent wettability characteristics In contrast to ceramic balls, TiC balls exhibit the bulk properties of the steel substrate (identical Young’s modulus, thermal expansion and hardness of steel balls and races) Complete traceability

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