the product name is Rail Guide Wheels

1.What types of your company? A:We are manufacture with long-term cooperated factories. 2.What are the advantages of your company? A:We have professional design team in crane parts. We can offer our costumer more competitive price, high quality and better service than factories. 3.How can I choose material for wheel? A:No worry about this. We can help find a material suitable for you according to your budget, application and freight cost. 4.Why a harden surface is necessary for wheel? A:Normally, the wheel tread surface is the most easily wearing part, as it touches ground or rail. So we need to get it anti-wear and extend its life time. The anti-wear performance can be promoted by harden tread surface. The service life can be extended by harden depth. 5.What is a key locking system? A:Simply, key locking system is that wheel and axle is rotating simultaneously. Another situation is that the wheel is rotating while the axle is fixed. A key locking wheel assembly is normally drive by a motor. Non-key locking system hasn't a dynamic system. url:http://www.hbcranehook.com