Threaded Tube Extensions for Continuous Deep Drilling (12" Lengths)


A great, low cost method of continuous deep drilling with diameters ranging from 1" - 6 1/4". Threaded tube extensions are made from heat-treated high speed steel and are 12" in length. Larger sizes are available upon request with short lead times. We recommend using oil or other lubricant for easier connecting and removal of the barrels.

NOTE: For use with Cougar Wet Diamond Bits (CORW) featuring a removable cap.

  • Brand: Delta Diamond Products Inc
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SKU: DIAMETER X OVERALL LENGTH USE WITH SKU# Price Qty Pricing Quantity
TECR-100 1" X 12" OAL CORW-0100 $22.00 Qty Pricing
TECR-112 1 1/8" X 12" OAL CORW-0112 $26.00 Qty Pricing
TECR-125 1 1/4" X 12" OAL CORW-0125 $28.00 Qty Pricing
TECR-137 1 3/8" X 12" OAL CORW-0137 $30.00 Qty Pricing
TECR-150 1 1/2" X 12" OAL CORW-0150 $32.00 Qty Pricing
TECR-162 1 5/8" X 12" OAL CORW-0162 $35.00 Qty Pricing
TECR-175 1 3/4" X 12" OAL CORW-0175 $38.00 Qty Pricing
TECR-187 1 7/8" X 12" OAL CORW-0187 $42.00 Qty Pricing
TECR-200 2" X 12" OAL CORW-0200 $45.00 Qty Pricing
TECR-225 2 1/4" X 12" OAL CORW-0225 $47.00 Qty Pricing
TECR-250 2 1/2" X 12" OAL CORW-0250 $49.00 Qty Pricing
TECR-300 3" X 12" OAL CORW-0300 $52.00 Qty Pricing
TECR-325 3 1/4" X 12" OAL CORW-0325 $55.00 Qty Pricing
TECR-350 3 1/2" X 12" OAL CORW-0350 $58.00 Qty Pricing
TECR-400 4" X 12" OAL CORW-0400 $62.00 Qty Pricing
TECR-425 4 1/4" X 12" OAL CORW-0425 $65.00 Qty Pricing
TECR-450 4 1/2" X 12" OAL CORW-0450 $68.00 Qty Pricing
TECR-500 5" X 12" OAL CORW-0500 $72.00 Qty Pricing
TECR-525 5 1/4" X 12" OAL CORW-0525 $76.00 Qty Pricing
TECR-550 5 1/2" X 12" OAL CORW-0550 $85.00 Qty Pricing
TECR-600 6" X 12" OAL CORW-0600 $88.00 Qty Pricing
TECR-625 6 1/4" X 12" OAL CORW-0625 $95.00 Qty Pricing