View a Larger Image of 3/8" x 10" Forstner Bit Extension

WoodRiver

3/8" x 10" Forstner Bit Extension

$20.99

Ships Next Business Day!

Forstner bit extensions solve one of the major problems with forstner Bits -- their limited depth capacity. This extension fits WoodRiver forstner bits only that have 3/8" diameter shanks.Features: • Designed for use with WoodRiver forstner bits only• Extension adds 10” to length of...

Details

Forstner bit extensions solve one of the major problems with forstner Bits -- their limited depth capacity. This extension fits WoodRiver forstner bits only that have 3/8" diameter shanks.
Features:
• Designed for use with WoodRiver forstner bits only
• Extension adds 10” to length of forstner bit
• Socket accepts forstner bits with 3/8” diameter shanks
• Forstner bit held in extension socket with two set screws
• 3/8” diameter drive shank allows use of multiple extensions

Reviews

3.5 out of 5 stars
12 Reviews
  1. 1.0 out of 5 stars
    by on

    Doesnt hold bit tight

    Every bit I've used with this extension just end up spinning in the extension instead of cutting the material. The set screws don't hold the bit tight enough to do any real drilling.

  2. 1.0 out of 5 stars
    by on

    First time used, it snapped

    Used to core pepper mill.. The shaft snapped within the first five seconds of use drilling a pepper mill blank.

  3. 4.0 out of 5 stars
    by on

    Forstner Bit Extension exceded expectat

    Well made Quality product

  4. 5.0 out of 5 stars
    by on

    Great Product

    I use this to extend my forstner bits while boring pepper grinders. I have found that this model has the best retention screws to hold bits in place.

  5. 5.0 out of 5 stars
    by on

    Excellent bit extension.

    Helds the bit straight and true.

  6. 5.0 out of 5 stars
    by on

    Works well with Woodriver 10pc bit set.

    Use with Woodriver 10pc bit set for woodturning bores. Seems very true and holds bits securely.

  7. 3.0 out of 5 stars
    by on

    Works with any forstner bit

    Even though the two set screws were very tight, my 1.5" forstner bit started slipping. Then I remembered reading a suggestion to slightly flatten one side of the round shaft on a grinder. This gave the set screws someplace to grab and the slipping was eliminated. Recommend to not get too agressive with large bits to avoid twisting the shaft and snapping it.

  8. 2.0 out of 5 stars
    by on

    Not what it is cracked up to be

    I don't like it. It wobbles too much when drilling thru holes. I made a better one from 3/8" id steel tubing by drilling two wholes and tapping for 2 allen screws. Works really well. I have made two for half the price of this one. (1) 5" and (1) 10"

  9. 2.0 out of 5 stars
    by on

    little flimsy

    when out toward the 3 0r 4 inch range starts to wobble and wander of center. needs to be a little beefyer in the shaft. but you get what you pay for

  10. 5.0 out of 5 stars
    by on

    All that I expected

    Use it for hollowing peppermills, lamps, and other long turned items.

  11. 4.0 out of 5 stars
    by on

    Forstner bit extensions 1st rate

    allows for deeper drilling of weed pots

  12. 5.0 out of 5 stars
    by on

    I'm a Happy Borer

    I don't know about all Forstner bits, but my set has a cylindrical shaft, which is difficult to grip. I simply ground a bevel on one side for the Allen screws to contact and there is no slippage even at the end of a long bore.

Compare With

Top of Page