Page 46 - notch_grip_2021

MeMaesturricemeUntsSER GUIDE • Whenever possible this description should be
confirmed by a simplified view showing thread
American Standard Buttress angles on the drawing of the product that has
Thread Designations the buttress thread.

• When only the designation BUTT is used, the • Always remember that the position of your
thread is a “pull” type buttress (external thread pulls) holder and direction of your feed will determine
with the clearance flank (45˚) leading and the the lead angle on the insert.
pressure flank (7˚) following.

• When the designation PUSH-BUTT is used, the
thread is a push type buttress (external thread
pushes) with the load flank (7˚) leading and the
45˚ clearance flank following.

External Buttress (45˚ lead) Thread Internal Buttress (45˚ lead) Thread American Standard Buttress

Counterclockwise Counterclockwise 1/2 d play P 0,0627 P
rotation rotation nut 0,1632 P

45˚ clearance flank of this 0,3 P 0,3 P
buttress thread becomes 0,8906P 0,3 P
the leading angle in this
chuck 45˚ clearance angle of this chuck application. 0,0826 P 7˚ 45˚ 1/2 d2 play
buttress thread becomes 1/2 d1 play screw 0,1632 P
RH insert the leading angle in this RH bar
45˚ Lead application. A_ -FLER
FLTB-2RB
FLTB-3RB LH holder feed
FLTB-4RB FLEL LH insert
45˚ Lead
feed RH holder FLTB-2LB
FLSR FLTB-3LB
FLTB-4LB

45°

Use: fittings and pipe couplings

Feed direction towards the chuck Feed direction towards the tailstock

External RH Thread • counterclockwise rotation Internal RH Thread • counterclockwise rotation External LH Thread • counterclockwise rotation Internal LH Thread • counterclockwise rotation
• right-hand toolholder • right-hand bar • right-hand toolholder • right-hand bar
• right-hand insert • left-hand insert • right-hand insert • left-hand insert

External LH Thread • clockwise rotation Internal LH Thread • clockwise rotation External RH Thread • clockwise rotation Internal RH Thread • clockwise rotation
• left-hand toolholder • left-hand bar • left-hand toolholder • left-hand bar
• left-hand insert • right-hand insert • left-hand insert • right-hand insert

Cross Reference Chart

STYLE TOOL-FLO KENNAMETAL® SANDVIK®* VALENITE®* HORIZON®* RTW®*
NA TLA VLA HA PA
ACME FLA TLAS VLAS HAS PAS
ND TLD # # #
ACME STUBFLAS NAS NDC TLDC # HDC PDC
NJ TLJ # HJ #
API-NON TOPPING FLD NJF TLJF # HJF #
NJK TLJK # # #
API-TOPPING FLDC NJP TLJP # # #
NT TLT VLRT HT PT
UNJ FLJ NTB TLTB # HTB #
NTC TLTC VLTC HTC PTC
UNJ-FINE PITCH FLJF NTF TLTF VLTF HTF PTF
NTK TLTK VLTK HTK PTK
UNJ-FINE PITCH-POSITIVE FLJK NTP TLTP VLTP HTP PTP

UNJ-POSITIVE FLJP

60˚ V FLT

AMERICAN STANDARD BUTTRESS FLTB

UN - UNIFIED FLTC

60˚ V - FINE PITCH FLTF

60˚ V - FINE PITCH POSITIVE FLTK

60˚ V - POSITIVE FLTP

*Top Clamp change is required when converting from SANDVIK®

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