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[et_pb_section fb_built=”1″ _builder_version=”3.22″][et_pb_row column_structure=”1_2,1_2″ _builder_version=”3.25″ background_size=”initial” background_position=”top_left” background_repeat=”repeat”][et_pb_column type=”1_2″ _builder_version=”3.25″ custom_padding=”|||” custom_padding__hover=”|||”][et_pb_text _builder_version=”4.7.0″ module_alignment=”left” hover_enabled=”0″ sticky_enabled=”0″] Grinding a Polyurethane Part Urethanes 55A to 80A durometer can be ground successfully in an engine lathe using a tool post grinder. Use low turning speeds – below 150 rpm, with the lathe running in reverse. Start with the […]

[et_pb_section fb_built=”1″ _builder_version=”3.22″][et_pb_row column_structure=”1_2,1_2″ _builder_version=”3.25″ background_size=”initial” background_position=”top_left” background_repeat=”repeat”][et_pb_column type=”1_2″ _builder_version=”3.25″ custom_padding=”|||” custom_padding__hover=”|||”][et_pb_text _builder_version=”4.7.0″ use_border_color=”off”] Knifing a Polyurethane Part Knifing polyurethane parts to close tolerances can be done without too much difficulty. The tool must be absolutely razor sharp and be as thin as possible. When knifing, the urethane will have a tendency to pull into

[et_pb_section fb_built=”1″ _builder_version=”3.22″][et_pb_row column_structure=”1_2,1_2″ _builder_version=”3.25″ background_size=”initial” background_position=”top_left” background_repeat=”repeat”][et_pb_column type=”1_2″ _builder_version=”3.25″ custom_padding=”|||” custom_padding__hover=”|||”][et_pb_text _builder_version=”4.7.0″ hover_enabled=”0″ use_border_color=”off” sticky_enabled=”0″] Parting Urethane Parts​ Tools that work well for parting are .060″ to .100″ (1.524 to 2.54 mm) wide with a 20 to 30 degree front rake and no top rake. A small 3/64″ radius is ground into the top

[et_pb_section fb_built=”1″ _builder_version=”3.22″][et_pb_row _builder_version=”3.25″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” column_structure=”2_3,1_3″][et_pb_column type=”2_3″ _builder_version=”3.25″ custom_padding=”|||” custom_padding__hover=”|||”][et_pb_text admin_label=”Urethane ranging ” _builder_version=”4.7.0″ hover_enabled=”0″ sticky_enabled=”0″] Milling Polyurethane Parts Urethane ranging from 90A to 70D durometer can be successfully milled without much difficulty. Attempting to mill parts below 80A is not recommended. Tools must be sharp and the work must be fixtured securely.

[et_pb_section fb_built=”1″ _builder_version=”3.22″ transparent_background=”off” make_fullwidth=”off” use_custom_width=”off” width_unit=”off” custom_width_px=”1080px” custom_width_percent=”80%”][et_pb_row column_structure=”1_2,1_2″ _builder_version=”3.25″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” make_fullwidth=”off” use_custom_width=”off” width_unit=”off” custom_width_px=”1080px” custom_width_percent=”80%”][et_pb_column type=”1_2″ _builder_version=”3.25″ custom_padding=”|||” custom_padding__hover=”|||”][et_pb_text _builder_version=”4.7.0″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” use_border_color=”off”] Contouring Polyurethane Parts Machining tapers, chamfers, grooves, and other surface configurations into wheels, rollers, and other round parts all fall into the general category of contouring. The

[et_pb_section fb_built=”1″ _builder_version=”3.22″][et_pb_row column_structure=”1_2,1_2″ _builder_version=”3.25″ background_size=”initial” background_position=”top_left” background_repeat=”repeat”][et_pb_column type=”1_2″ _builder_version=”3.25″ custom_padding=”|||” custom_padding__hover=”|||”][et_pb_text _builder_version=”4.7.0″ module_alignment=”left”] Cutting Polyurethane Parts​ One of the best machines for cutting urethane parts is a band saw. Long blades of 125 to 175 inches (3,175 to 4,445 mm) are desirable because they stay cooler and keep the urethane from melting. A band