Slow Speed KIT Walker Turner 1100 20 Inch Drill Press 2 7/8" ID

Description

Item priced to put on hold as I am waiting on restock of pulleys at this time.  Check back.
This items is a speed reduction pulley and with special mount to fit a 2 7/8" ID drill press column for 4L (1/2") belts.  If your column measures something like 2,850 to 2.900 (2-7/8" is 2.875)") you've found the right adapter.  4 Belt Sheave. (I do not have 5 belt sheaves)
This was designed specifically to fit a customers Walker Turner 1100 with 2 7/8" id column.  This speed reducer has 4 sheaves and must be run with offset belts centered vertically to the factory 5 belt sheaves (1/2 belt offset is fine) or registered to top or bottom of motor or quill pulley.  It could be used with other large drill presses but measure your column first!  I have many sizes available, search my listings.  (Note photos are of a 900 series and not the 1100 20" drill press this is intended for.)
Slow speed drive system fits entirely inside many belt covers, a Delta example is shown.  Reduces RPM at chuck.  Slower cutting speeds work better for metals.  Larger diameter cutters such as hole saws, paddle and Forstner bits cut better with less heat and wear when turned at proper speeds.  Small diameter bits require higher speeds.  This pulley while capable of cutting your final output speed in 1/2 is also capable of doubling it making bits under 1/8" must less fragile.    Add about 0 value to your vintage American iron.
The column adapter has a socket head driven spreader acting like an internal collet to snug the adapter against rotation in the column.  Only snug until you cannot rotate adapter by hand.  No more pressure is needed as there is little or no operating force trying to move it.   As shown, the adapter is positioned generally so bushing is to one side of press and pulley yoke is swiveled across center of the column tube towards the other side of drill press.  This keeps it from getting too far off center to interfere with belt guards.  Thus far it has fit inside of the guards of every one of my drill presses thus far tested.  I have no idea what dimensions yours are.
1) Your machine MUST have a column with 2.875" (2 7/8" within .032 +/-) bore. This is found in Walker Turner 1100's and possibly others.  Check yours before ordering.  I list other sizes in other listings.
If you need to fit different inside diameter, please contact me.
2) The column must be capable of protruding through the top of the head casting. (See caliper photo.)
3) Comes with 4 groove pulley system requiring 1/2" belts or 4L belts. (Converts your 4 speed into a 12 speed with both slower and faster speeds.  4L is a 1/2" belt.)  4 grooves must work for you.
4) Flipping the motor drive pulley over is required.  All of them I have seen can be flipped without machining.  I have not seen yours.  Check it.
5) Adjusting the head height on the column is required to find best belt alignment. Don't worry, V-belts can be run very far out of alignment with no issues.  This is not a sensitive setting.
6) Your belt guard (if so equipped) bottom or base plate must not cover the drill press column. If it does, a hole must be cut approximately 3.25" in diameter to reveal the tube opening.
This item includes:
Metal pulley loaded with ball bearings, pivot yoke, bronze pivot bushing and additive manufacturing column adapter machined to accept a bronze bushing and securing hardware.  This item is made by me including sourced and modified parts.  The drill press and belts shown are props used to show application of slow speed update kit and are not included.
Don't buy this hoping it will fit.  MEASURE THE BORE of your column.  If your bore is different, please send me a photos of your drill press, caliper measurements and model of drill press.  I just might make a special one for you.
Drill Presses so far measured:  (Order from correct listing!)
Atlas "73", "74" 15" (and all similar models)  2.5" id  See Other Listing - I have raised mounting for these.
Craftsman DP100 & 150 LATE MODELS  2.5" id (Only top of column is bored to size, check both ends to verify proper installation of column)
Craftsman DP100 & 150 EARLY MODELS 2.375" ID on Top of properly installed column.
Delta DP-220 15"  ID 2.418" (Buy 2.375" model in other listing. Internal collet expands to lock tight)
Delta 15-091 15"  Likely 2.5" ID - See Other Listing
Delta Rockwell DP-211 14"
Likely 2.5" ID - See Other Listing
Delta Rockwell 15-655
Likely 2.5" ID - See Other Listing
Walker-Turner 900 series.  Some are 2.437 id, some are 2.375 id.
Walker-Turner 1100.  2.875 bore.
DO NOT RELY ON ABOVE LIST.
It is up to you to MEASURE YOUR COLUMN TUBE ID.  This item fits 2.875" tube ID.  Let me know if you need something different.