You'll likely need to find a LCB to properly classify your items. The HTSUS may have an eo nomine provision for electric servo motors....or they may fall under a general use provision? Either way...you'll need a broker to calculate applicable duty, HMF, MPF, and to facilitate the payment due to US Customs.

If your servos are brushless they are likely to be classified as 8501.10.4040 or non-brushless as 8501.10.4060....or possibly 8501.10.6040 and 8501.10.6060 respectively(depending on ouput wattage).

We receive dozens and dozens of shipments monthly from China, so far there has not been a single tariff increase on any of our products. We do, and always have paid tariffs on all products (generally in the 1.5% to 4% range depending on product) but nothing has increased for years.
As stated above most tariffs do not apply to individual consumers, in some countries they do this and that is generally referred to as "VAT" (Value added tax) and those fees are collected right by the company shipping the product to you who in turns pays it to the respective agency. When we pay tariffs/duties on our shipments we pay them directly to the shipper and they are responsible for forwarding our payment to the Feds.
If tariffs do hit our products then yes, we will all see increased prices across the board from all suppliers. The "loophole" to this is going to be the companies that are Chinese companies with satellite locations (i.e. warehouses by the docks in SoCal) that can falsify docs to show much lower values and pay lower overall tariffs.
Although tariffs could have a significant impact on our business I do believe that the end result is going to be positive.