FLAT BARREL ROLL CHUCK MECHANISM
FOR WORK AND BURRING SPINDLE

Follow these instructions for easy installation of
Barrel Chuck Mechanism NP-100-40-SA

1. Remove:
   a. 4th position cam
   b. tool spindle cam carrier
   c. front cam carrier
2. Adjust the chuck closing block P/N 5139-2
   a. Loosen the top bolt P/N 837 of the chuck closing
     lever P/N 5139-1 approximately 2 turns.
   b. Tighten the bottom bolt P/N 837 of the chuck
     closing lever.
3. Remove:
   a. feed tubes
   b. spindle drive gear from spindle change gear stud
     P/N 626-A-1 (to prevent spindle rotation)
   c. spindle collets
   d. existing chucks or fulcrums
4. Loosen inner spindle thrust nut (left hand thread)
   P/N 5080-2221. DO NOT REMOVE IT.
5. Remove:
   a. ball retainer nut P/N 5080-390
   b. inner spindles
     NOTE: THE NP-100-40-SA CAN BE USED WITH EITHER
     2 EXTENSION OR 3 EXTENSION INNER SPINDLES
   c. the 4th position stationary head, tooling and spindle
   d. 15 spindle gear screws P/N 767 or set screws P/N
     1263-93
   e. outer spindles
     -number each spindle so it can be returned to proper
     spindle front bearing housing P/N MH-100,
     if the spindles are not worn out
   f. clean outer spindles
6. Examine back end of the outer spindles for wear caused
   by extensions.
   a. If the wear is greater than 0.002" deep, grind back
     end of the outer spindle until it is square and has no wear
     marks. Rebuilt spindles may also need to be ground
     NOTE: FAILURE TO PERFORM THIS OPERATION WILL
     RESULT IN IMPROPER MATING BETWEEN NEW
     SHORT EXTENSION P/N MB-635-13 & THE
     OUTER SPINDLE, CAUSING THE BARREL CHUCK
     NP-100-40-SA TO NEED FREQUENT ADJUSTMENTS.
7. To install new or rebuilt spindles:
   a. loosen & unscrew central nut of the tool post stop
      P/N 2186
   b. this step applies only to machines with spindle
     stopping attachments P/N 2496-5-SA or spindle 
     aligning gears P/N 1263-132-SA
8. For easier reassembling, mark the tool post stop and face
   of the head Casting for alignment.
9. Remove:
   a. 5 socket head cap screws P/N 843-a
   b. tool post stop assembly
   c. spindle front bearing nuts P/N MH-100-3
   d. spindle front bearing housings P/N MH-100
10. Check spindle front bearing housing lubrication holes
    for obstruction.
11. Reassemble machine in REVERSE ORDER.
    a. leave out 15 spindle gear screws (step 5d)
    b. replace fulcrum extensions P/N 5080-2217 with new
      Barrel chuck short extensions P/N MB-635-13
12. Install and Tighten:
    a. inner spindles
    b. inner spindle thrust nut (left hand tread) and
      ball retainer nut (right hand thread)
    c. 15 spindle gear screws or set screws
      NOTE: BE SURE OUTER SPINDLE MOVES FREELY OVER INNER
      SPINDLE AFTER TIGHTENING.
13. Replace spindle collets
14. Put barrel chuck mechanism into chuck slide P/N 328
    a. slide it on to machine
    b. be careful not to push out key P/N NP-100-4 from
      barrel chuck
    c. put fiber washer P/N 911 on back end of spindle and adjust nuts
15. Replace assembly socket head cap screw P/N NP-510
    in barrel chuck with the enclosed plug screw P/N NP-500
16. Replace feed tubes and stock up the machine
17. BEFORE OPERATING THE MACHINE:
    a. Be sure the chuck slide roll & pin clear the chuck
      closing lever P/N 5139-1
    b. IF ON INDEX, CHUCK SLIDE ROLL & PIN HIT CHUCK
      CLOSING LEVER
      1. remove the chuck closing lever
      2. machine (remove material from) the chuck closing lever until it
         clears the chuck slide roll & pin.
18. Adjust:
    a. collet tension
      - same as with fulcrums
    b. CAUTION, a slight turn of the adjusting nut
      changes the collet tension dramatically
    c. Explain to machine operator about dramatic
      adjustment
    d. chuck closing block
      1. open all five barrel chucks approximatly 1/16 (.062) in, (1.5mm)
        observe figure 2. above
      2. let the machine index in JOG
      3. tighten chuck closing block until all five chucks are closed
        (same as running fulcrums)
      4. IF EXCESS VARIATION IN DISPLACEMENT (IN THE CHUCK OPEN
         DIRECTION) BETWEEN OUTER
         HOUSING P/N NP-100-40 (LEFT HAND END) AND INNER SLEEVE P/N
         NP-100-31 ALIGMENT GROOVE IS OBSERVED, SEE FIGURE 2
         (MAXIMUM SHIFT = 0.015 INCH / .3 MM)
          -exchange/ replace chuck slides
          -all barrel chucks should close the same amount
          -THIS IS IMPORTANT FOR LONG LIFE
    
19. The Barrel Chuck Assembly is a prelubricated unit for low maintenance. Removal of the assembly from the machine is NOT necessary for periodic lubrication. Annual lubrication of each unit is recommended. To lubricate the chuck, use the following procedure. Tools required for lubrication are NP-7548-Z, Lube Applicator; NP-28, Wedge Chuck Lubricant (16 oz. can); NP-30, Lube Applicator Nozzle and 1/16" Hex Key. With the unit in the closed position, simply remove NP-500 Plug screw and grease each chuck, replace the plug screw.
    
    

    Part Number	NP-28/OZ.	# Full Pumps with NP-7584-Z/Unit
    NP-100-40-SA	0.8 oz.	4 pumps/unit

    
    ***Lubrication frequency and volume may vary with application***
    
    For further technical assistance contact Nowak Products at:
    860-666-9685
    800-423-0970
    E-mail:nowak@nowakproducts.com
    
    WARNING TO ALL USERS OF THE NP-100-40-SA BARREL CHUCKING
    MECHANISM FOR THE WORK AND BURRING SPINDLES.
    
    The NEW STYLE DAVENPORT® CHUCK ADJUSTING NUT,
    641-2 for standard and oversize Davenport® Automatics MAY CAUSE
    SEVER DAMAGE TO THE BARREL CHUCKING SYSTEM.
    
    New style chuck adjusting nuts have a tendency to
    self-tighten while the machine is running. This causes excessive
    closing pressure in the chucking system.
    
    We do not recommend the use of this style chuck adjusting nut.
    
    We recommend the old style chuck adjusting nuts P/N 641 and
    the chuck adjusting nut washer P/N 897 system. It can
    be locked more tightly and does not have a tendency to
    self tighten.