理查德·休伊特和拉尔夫托珀姆于1938年创立的公司。

在1966年收购了该公司，由目前的业主，并自那时以来，已经运行了作为一个家族企业。

虽然翰威特与托珀姆有限公司拥有丰富的技能和经验，在一般的精密工程业，该公司专门定制的齿轮，包括正齿轮，螺旋锥齿轮，双螺旋锥齿轮的制造，
渐开线花键的内部和外部，内部和外部直样条曲线，弧齿锥齿轮，螺旋伞齿轮，蜗轮减速机（也被称为蜗轮），支架，锯齿，链轮（链轮），棘轮扳手，齿轮磨床，螺纹磨床，并提供转包和备件在国内和国际市场。该公司自诩其产品的质量。

弧齿锥齿轮
 
弧齿锥齿轮作出的大部分是相互的轴成直角和与趴在相同的点的间距锥体的顶点。齿的大小减小为圆锥顶点接近牙齿的轮廓也改变的齿的尺寸减小。

弧齿锥齿轮设有差动齿轮装在后轴机动车，和驱动器从主轴的背面的轴驱动器，包括大量的。它们也可以用来在驱动器上的许多机器工具。
Company profile
  
Richard Hewitt and Ralph Topham founded the company in 1938.

The company was purchased in 1966, by the present owners, and has been run as a family business since then.

Although Hewitt & Topham Ltd possesses a wealth of skill and experience in the general precision engineering fields, the company specialises in the manufacture of custom made gears, including Spur Gears, Single Helical Gears, Double Helical Gears,
Internal and External Involute Splines, Internal and External Straight Splines, Bevel Gears, Spiral Bevel Gears, Worm Gears (also known as worm wheels), Racks, Serrations, Chain Wheels (Sprockets), Ratchets, Gear Grinding, Thread Grinding, and supplies the subcontract and spares market both nationally and internationally. The company prides itself on the quality of its products.

Bevel Gears
  
The majority of bevel gearing made is for shafts at right angles to each other, and with the apex of the pitch cones lying at the same point. The size of the tooth diminishes as the cone apex is approached; the contour of the tooth also alters as the tooth size decreases.

Bevel gears feature in a large number of drives including the differential gearing fitted in the rear axle of motorcars, and the drive from the main shaft to the back shaft. They are also used on the drive of many machine tools.