Name	Centers	Max. Stroke	Comments
Rotator™
Size S-100RT	.100 (2,54)	.220 (5,59)	Rotates 90° @ .170" (4,32) travel
Size S-075RT	.075 (1,91)	.225 (5,72)	Rotates 90° @ .170" (4,32) travel
Size S50JRT	.050 (1,27)	.250 (6,35)	Rotates 85° @ .170" (4,32) travel
Size S50CRT	.050 (1,27)	.250 (6,35)	Rotates 85° @ .170" (4,32) travel
Steel Plungers
Size S-100/ICT-100	.100 (2,54)	.250 (6,35)	Fifteen Steel Plunger Options
Size S-075/ICT-075	.075 (1,91)	.250 (6,35)	Eight Steel Plunger Options
Size S-50J/ICT-50J	.050 (1,27)	.250 (6,35)	Eight Steel Plunger Options
Size S-50C/ICT-50C	.050 (1,27)	.250 (6,35)	Eight Steel Plunger Options
Aggressive Springs
Size S-100/ICT-100	.100 (2,54)	.250 (6,35)	8, 10 and 17 oz. @ .170" (4,32) travel
Size S-2	.100 (2,54)	.250 (6,35)	8 & 10 oz. @ .170" (4,32) travel
Size S-075/ICT-075	.075 (1,91)	.250 (6,35)	8 & 10 oz. @ .170" (4,32) travel
Size S-50J/ICT-50J	.050 (1,27)	.250 (6,35)	7 & 10 oz. @ .170" (4,32) travel
Tri-Needle
S-100 Tri-Needle	.100 (2,54)	.250 (6,35)	8 & 10 oz. @ .170" (4,32) travel
ICT Series ™
ICT-100	.100 (2,54)	.250 (6,35)	8, 10 and 17 oz. @ .170" (4,32) travel
ICT-075	.075 (1,91)	.250 (6,35)	7 and 10 oz. @ .170" (4,32) travel
ICT-50J	.050 (1,27)	.250 (6,35)	7 and 10 oz. @ .170" (4,32) travel
ICT-50C	.050 (1,27)	.250 (6,35)	5.4 oz. @ .170" (4,32) travel

Selection of Fluxbusters
Choosing an effective Fluxbuster is a process that should be based on factual information and experience. Some test engineers have found that progress can be made quickly by starting with the most effective possible probe for a given target and contamination type. Because the most effective Fluxbusters are more expensive than their standard counterparts, other test engineers start with more standard probe styles. The chart below rates Fluxbusters in terms of their effectiveness as reported by many customers, versus the appropriate contamination level, and test target.

Rated from 0 to 10, with 10 being optimal

Series	Leads	Pads	Filled Vias	Unfilled Vias	Flux Residue	Conformal Coatings and Solder Masks	OSP Coatings	Lead Free Surfaces
Rotators	N/A	10	9	N/A	Excellent	Excellent	Excellent	Excellent
Tri-Needle (TN)	10	7	3	N/A	Excellent	Excellent	Superior	Superior
Single Needle (SN)	N/A	8	6	N/A	Excellent	Excellent	Superior	Superior
Needle Teeth (NT)	7	9	2	1	Excellent	Good	Good	Good
Chiseled Spear (SP/SPB)	N/A	9	7	7	Excellent	Superior	Excellent	Superior
Arrowhead Spear (AW)	N/A	9	8	8	Excellent	Superior	Good	Excellent
Tapered Crown (UST/UR)	N/A	8	8	8	Superior	Good	Good	Good
Steel Plungers with high spring forces	6	6	6	6	Superior	Superior	Good	Good
Be Cu Plungers with high spring forces	3	3	3	3	Good	Fair	Good	Fair

Steel Plungers
With the introduction of no-clean technology, the tip and edge life of plunger tips have become much more critical to successful penetration of contaminants, resulting in the introduction of steel plungers into the market. The steel plungers have a hardness of 50-55 on a Rockwell C scale compared to 36-42 for beryllium copper plungers. The steel plungers have a slightly higher resistance than their beryllium copper counterparts, approximately 3 milliohms for a Size S-100 plunger. IDI has expanded the steel plunger product line to include several options for testing on .100 (2,54) centers, .075 (1,91) centers and .050 (1,27) centers. For more information on the metallurgical differences between beryllium copper and tool steel, see page 132 of the Source Book. For more information on tip applications, see pages 102 to 105 of the Source Book.