Internal gears have several advantages when properly applied. One of the benefits is that the sliding effect is reduced. The corresponding tooth surfaces of the internal gear and the pinion gear are closer to the same length than when the external gear and the pinion gear have the same gear ratio and tooth length. Therefore, the relative slip of the teeth is less inside the case. This point brings up one of the advantages of using internal gears. The sliding action of one tooth on the other tooth causes friction; since friction causes tooth wear, it is advisable to reduce the sliding action. 

The tooth profile is a reverse involute, which is a conjugate involute, just like an external gear is dug out of a discus. Basically, medium carbon steel is used for quenching and tempering, the carburized ring gear is basically a small modulus, and the gear is processed by wire cutting after heating.

Q1: What information will be highly appreciated for a quotation?

A: It will be preferred if you can offer us the drawings, heat treatment and surface treatment requirements, required quantity, quoted currency (USD or CNY), or samples.

Q2: Are you a trading company or factory?

A: Vanhon is a trading and factory located in Qingdao, Shandong.

Q3: What is your terms of payment?

A: T/T 50% in advance, and 50% before shipment. We'll show you the photos of the products and packages before you pay the balance.

Q4: Do you test all your goods before delivery?

A: Yes, Vanhon has adopted a strict quality management system and all the items will be inspected according to the inspection instruction with good inspection records.

Q5: How does your company ensure the quality of the raw material?

A: The steels are purchased from our domestic well-known steel mills. After receiving the raw material, the steel will be inspected by spectrograph imported from Germany. Besides, the furnace number of steel will be well-managed in our ERP system to ensure the traceability of our products.

Q6: How do you ensure the high quality of products?

A: With integral manufacturing processes, a strict quality control system and imported machines, we can manufacture high quality products.

Q7: What are your terms of delivery?

A: EXW, FOB Qingdao.

Q8: How about your lead time?

A: Normally it will take 45 days after receiving your advance payment. The specific lead time depends on the items and the quantity of your order.