How to set special claim keys for Block Producer

Step 1. Create custom permission

cleos set account permission YOURACCOUNT claim CLAIM_PUBLIC_KEY active -p YOURACCOUNT@active
​

Step 2. Link action to permission

cleos set action permission YOURACCOUNT eosio claimrewards claim -p YOURACCOUNT@active
​

Claiming the rewards

cleos system claimrewards YOURACCOUNT -p YOURACCOUNT@claim
​

Removing the permission

cleos set account permission YOURACCOUNT claim NULL active -p YOURACCOUNT@active
cleos set action permission YOURACCOUNT eosio claimrewards NULL -p YOURACCOUNT@active

Credits to Igor at EOS Rio for providing these instructions: https://steemit.com/@eosrio