Here is an economic, functional and reliable laboratory sample pulveriser of the ring and puck type; sometime called ring mills. 

They come it many varied high manganese steel grinding canister size and capacity. The most popular  models being:

• 1MZ-100: single grinding bowl of 100 gram sample capacity
• 1MZ-200: single pulverising bowl of 200 gram capacity
• 1MZ-400: single grinding bowl of 400 gram capacity
• 7MZ-100: 7 grinding bowl of 100 gram capacity

Please see the table and images below to better understand what laboratory pulverizer model best suits your needs.