MULTI RATIO WORM GEAR BOX ALUMINUM AND BRASS 1/4 SHAFTS 30-40-50-60:1 CHANGE! SUPER HIGH QUALITY COMPLETE WITH INSTRUCTION SHEET TO AID WITH GEAR CHANGING AND LUBRICATION.THIS ALSO COMES WITH THE 2 HEX KEYS ON DISPLAY IN THE PICTURES! This worm gear box is brand new and it comes with four different size worm wheels. These gears are all 32 pitch 14.5 degree P. The specs on the instruction sheet state-- max. Continuous torque is 195 oz.
Serviceable for reduction use only. Will not back-spin during power interruption or failure.Backlash is rated at 35-40 minutes (when properly adjusted). The input worm gear is a single lead so the ratios are the same as the tooth counts. I have never seen one like this before. It is very neat with the feature that allows you to select the ratio that you want and then change it later. To change the gearing you remove the bottom and then remove the axle and change the gear and put the unit back together. The two brass sliders move up and down to adjust the gear mesh.
The instructions say to use a small piece of paper in between the gear teeth. You insert this small strip of paper and then pull the gears tight and then tighten the four screws on the brass sliders. You then rotate the worm and remove the piece of paper and the resulting gap is the backlash that prevents the mesh from binding and being too tight. Then apply a smear of grease or a few drops of sewing machine oil or the like. THERE IS NO NEED TO REMOVE THE INPUT SHAFT/GEAR BECAUSE OF THE BOTTOM ACCESS!
Please note that the bearing boxes are not part of the sale. They were empty and were tossed. High precision shaft material manufactured by precision Marshall.
All four of the shaft collars are high-quality stainless steel manufactured by Boston gear. The base and the body are made from solid aircraft aluminum and a lid is made from solid brass. The input shaft is supported by two instrument grade high precision ball bearings for smooth operation. All of the assembly hardware is stainless steel for corrosion resistance and long life.
All of the set screws are also stainless steel. 4 mounting holes in the base to attach to your project. These holes are 3/16 for a #10 size fastener. Output shaft supported by the 2 large brass bushings.
THIS WILL BE RE-ATTACHED TO THE ORIGINAL 8 1/2" X 11" BOARD AND THEN PLACED IN THE BOX. THIS PREVENTS IT FROM MOVING AND PROTECTS IT FROM DAMAGE. IT ISOLATES IT IN THE CENTER OF THE BOX. THE OTHER 3 GEARS ARE STACKED ON A BOLT AND SECURED WITH A NUT SO THEY WONT BOUNCE AROUND IN THE BOX OR GET LOST. The item "MULTI RATIO BRASS WORM GEAR SPEED REDUCER 30-601 HOLLAND PRECISION BOSTON MA" is in sale since Monday, March 25, 2019.This item is in the category "Business & Industrial\Automation, Motors & Drives\Mechanical Power Transmission\Gearboxes & Speed Reducers". The seller is "hangmelina" and is located in McCordsville, Indiana. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.