The core used on all old Faball Hammer bowling balls from the 80’s through the early 90s was a symmetrical Low RG weight block with low differential.
It’s hard to know the original specs but it probably fell between 2.49 and 2.54 and the diff was probably between .015 and .025.
Here is a rendering of the core for all original Urethane FAB balls from the 80’s and early 90’s.
Once resin came into the picture in 1992 Faball balls began experimenting with different shaped cores and different urethane formulas.
For a list of all old FAB Hammer bowling balls in order of their approval with the PBA see below:
- Hammer Black Urethane 8/27/1982
- Hammer Blue Urethane (Date Unknown)
- Hammer Red Urethane 1/15/1985
- Hammer Blue Pearl Urethane 1/4/1987
- Hammer Red Pearl Urethane 12/18/1987
- Hammer Nail Urethane (Blue) 1/30/1989
- Hammer Pink Urethane 11/20/1989
- Hammer Burgundy Urethane 10/1/1992
- Hammer Red Reactive Urethane 6/6/1994
- Hammer Purple Reactive 1/1/1995
- Hammer Red Razor Reactive 6/16/1995
- Hammer Berry Reactive Razor 6/16/1995
- Norm Duke Signature Blue Reactive 7/7/1995
- Ice Blue Pearl Razor Reactive 12/1/1995
- Nova Hammer – Purple Reactive – 1/19/1996
- Nova Hammer Pearl – Purple Reactive – 1/19/1996
- 3-D Hammer Pearl – Violet Reactive – 5/21/1996
- PC2 – Bay Blue Pearl Reactive – 11/22/1996
- PC3 – Cajun Red Urethane – 11/22/1996
- 3-D Offset Hammer – Violet Reactive – 1/21/1997
- 3-D Offset w/VB Mica – Blue Reactive – 5/27/1997
- Striking Red 3-D Offset – Red Microflex 12/11/1997
The Blue Hammer with white logos and blue pin was made by Faball from 1993 to 1996 when the company was owned by Faball Enterprises. The Blue Hammer with orange logos and matching orange pin was made by Faball after 1996, when the company licensed their name to Faball USA. (If you look closely, you can see the serial# on the ball, it starts with a “O98.” Faball serials always started with a letter indicating the city where the factory who poured the ball was located, and a 2-digit number indicating the year it was made. In this case, 1998.