The black nitrile rubber (NBR) is, since the beginning of chip assembly applications an appreciated base material to produce replaceable tip. Despite the emergence of other materials ( see our PCTR, BPCT or FCTR), the rubber has conserved properities giving satisfaction and flexibility.
SPT proposes a variety of rubber tips which are finished to the desired sizes.
When and Why to use CTR or RTR :
The range of available sizes starts with a minimum size of 025x025 up to 400x400 mils
Every type is build from a family of 4 distinct types identified as: A B C D
The types A and B are compatible with the shank having the square insert type A/B while the others are compatible with any shank having the square insert type C/D