© Midmark Corporation 2020
English - 11
TP202 20-42-FO-00014 Rev A1 C2169
003-1879-99
Operation
Low-Speed Handpiece Operation
Placing & Removing Handpiece Burs or Doriot Attachments & Heads...
1) Holding the handpiece in your left hand, depress the chuck housing ring toward the
body of the handpiece while twisting 1/4 - turn counter clockwise to open the chuck.
2) To install align Doriot slot with tab on housing. Then insert bur or Doriot attachment fully
into the chuck housing
3) To remove pull out the bur or Doriot attachment to remove from chuck.
4) Return the ring to its original “locked” position by twisting 1/4 - turn clockwise.
5) Double check to be sure bur / attachment is securely locked in place.
Operating Recommendations...
Air Pressure: The dental unit air pressure for low-speed handpiece should be adjusted
between 35 and 50 psi.
Air Supply: Moist or dirty air from the compressor can damage the Midmark Low-Speed
handpieces. Check the filters often. If dirt or moisture is present, replace the filter and bleed
the system.
Empty Operation: The Midmark Low-Speed handpiece will not operate unless the chucking
system is fully engaged. This minimizes risk of damage to the chuck.
Forward/Reverse Speed Direction Ring...
The speed-direction ring can be rotated either clockwise for forward direction, or counter-clockwise for
reverse. The more the ring is turned away from the mid-position, the faster the operating speed. If the
ring is in mid-position, the handpiece will not operate.
Chuck Housing
Ring
Housing Tab
Forward/Reverse Speed
Direction Ring
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