who was Baba Balak Singh Namdhari?

Answer 1

Namdhari Movement

The founder of the Namdhari movement was Baba Balak Singh, born in 1799 in the north-west province of Pakistan. The main aim of this movement was to revive and maintain the purity and glory of Sikhism. He took to preaching and popularising teaching of the Sikh Gurus. He used to exhort people to lead simple and pure lives and recite the Nam, earn with honost labour and give one-tenth of earnings to charity, give or take no dowry, abstain from meat, wine, and tobacco, not to seek alms and do good to all. Namdharis were out to eradicate a number of Social evils like child marriage, infanticide, sale and barter of girls and discrimination between the sexes.

Thus Namdharis or Kukas started well and did a lot of good work towards reforming the Sikh society. But with the passage of time they have drifted back into some of the Hindu practices and rituals like untouchability and havans. They also consider their leader as their Guru and do not administer Khande-ki- Pahul as ordered by the tenth Guru. They have also made some changes in Ardas. Thus they have formed themselves into a separate sect, differing in some important aspects from the mainstream of Khalsa. Therefore their leaders are not accepted as the leaders of the Khalsa Panth.

Answer 2

I think this is what you're looking for: http://www.sikh-history.com/sikhhist/events/namdhari.html Namdhari is the sect. Perhaps you can find more info doing a search for balak singh.

Jim