Alessi chin spice grinder how do I put it back together

you can replace it by contacting cuisineart on line and or their toll free number provide the part # and they will send you another one it will cost you though

A spice grinder, also called an "herb grinder", "is a cylindrical device with two halves (top and bottom) that separate and have sharp teeth or pegs aligned in such a way that when both halves are turned, material inside - typically herbs and spices for cooking or more commonly for tobacco is shredded, resulting in a product that burns more evenly and improves easiness of rolling when preparing a hand rolled cigarette and improves texture and flavor of spices. Herb grinders are typically made of either metal or plastic and come in a variety of colors and polished metals."
(Wikipedia)

Go to this website: http://www.hsn.com/products/wolfgang-puck-bistro-spice-mill-with-peppercorns/7012934
and click on the Video under the grinder picture. I think this may be helpful

Yes! you can get the part here:
http://www.connox.com/categories/spare-parts/replacements-alessi/spare-parts-alessi-pepper-grinder.html
Its 6 euro

The best idea is to grind some rice to remove the spice pieces that are stuck. After doing this, wipe it clean with a paper towel or a cloth towel. Try not to get it wet, this makes all the spices get clumpy and it will be even harder to clean.

I have had a few different spice grinders over the years and this one is my favourite by far. Just don't use it for both coffee and spices. If you want to also grind coffee beans, i would recommend buying a second one.http://www.cooking.com/black-3-oz-coffee-grinder-by-krups_111215_11/?ccaid=AFFL1&&/

While I don't have this brand or model of grinder, (coffee beans, spices?), I use a small elec. grinder for grinding coffee beans and unless the grinder and cover or perfectly lined up and locked in place, it willnot grind, a safety feature. Check and make sure everything is lined up so it closed with all the lines in place and the grinder is also put into the lock position.

smack it really hard

You will need:- Large cooking pot- Grinder- Tongs- Hot pads or oven mitts (mitts are recommended)- CautionPut the grinder into a large cooking pot. Fill the pot with water until the grinder is completely submerged. Make sure that the plastic parts of the grinder do not touch the bottom or sides of the pot. On the stove-top bring the water in the pot to a boil. Once the water is boiling turn off the heat. The grinder is now very hot and full of hot water so be careful not to burn yourself. Using tongs remove the grinder from the water and hold it upside down to drain most of the trapped water back into the pot. Now turn the grinder upright again to trap any remaining hot water. Using your hot pads or oven mitts grasp the glass part of the grinder in one hand and the plastic part with the other hand and pry them apart. Let both parts of the grinder dry completely then refill it and snap the plastic top back on. These make great grinders for other spices as well such as coriander. Enjoy!