These tools use patented ergocentric cutters to clean hard scale from typically larger tubes that are found in boilers. The ergocentric cutters ensure that the same tooth does not touch the same spot when cleaning and prevents grooves being formed in the tube scale. All cone cutter tools are fitted with universal joints to negotiate bends in curved tubes

One Cone Tool These consist of 1 Cone fitted onto a Universal Joint and are used when scale build up is not severe.
Two Cone Tool These consist of 2 Cones fitted onto a Universal Joint and are used when scale build up is severe.
Three Cone Tool These consist of 3 Cones fitted onto a base which is fitted with a Universal Joint and are used for cleaning larger (2.5/16" I.D. and up) tubes where scale build up is severe.

One Cone & Two Cone Tools
Straight Tube I.D.		Curved Tube I.D.		One Cone Tool Model	Two Cone Tool Model	Cone Diameter		Spare Cone Model	Spare Universal Joint Model
mm	inch	mm	inch			mm	inch
27.0-33.3	1.1/16-1.5/16	30.2-36.5	1.3/16-1.7/16	PM-OCT-1063	PM-TCT-1063	23.8	15/16	PM-SCT-937	PM-UCT-1063
31.7-36.5	1.1/4-1.7/16	36.5-42.9	1.7/16-1.11/16	PM-OCT-1250	PM-TCT-1250	27.0	1 1/16	PM-SCT-1062	PM-UCT-1250
35.0-39.7	1.3/8-1.9/16	42.9-49.2	1.11/16-1.15/16	PM-OCT-1375	PM-TCT-1375	30.2	1 3/16	PM-SCT-1187	PM-UCT-1250
38.1-46.0	1.1/2-1.13/16	49.2-55.5	1.15/16-2.3/16	PM-OCT-1500	PM-TCT-1500	36.5	1 7/16	PM-SCT-1437	PM-UCT-1250
44.5-58.7	1.3/4-2.1/16	55.5-61.9	2.3/16-2.7/16	PM-OCT-1750	PM-TCT-1750	42.9	1 11/16	PM-SCT-1687	PM-UCT-1250
50.8-60.3	2-2.3/8			PM-OCT-2000	PM-TCT-2000	49.2	1 15/16	PM-SCT-1937	PM-UCT-1250

Three Cone Tool
Straight Tube I.D.		Curved Tube I.D.		Three Cone Tool Model	Spare Cone Tool Model	Spare Base Model	Spare Universal Joint Model
mm	inch	mm	inch
58.7-73.0	2.5/16-2.7/8	61.9-79.4	2.7/16-3.1/8	PM-PCT-2313	PM-SCT-937	PM-CTB-2313	PM-UCT-1250
71.4-85.7	2.13/16-3.3/8	77.8-93.7	3.1/16-3.11/16	PM-PCT-2813	PM-SCT-937	PM-CTB-2313	PM-UCT-1250
84.1-96.8	3.5/16-3.13/16	92.1-103.2	3.5/8-4.1/16	PM-PCT-3313	PM-SCT-1062	PM-CTB-2313	PM-UCT-1250