Page 46 - notch_grip_2019

Measurements USER GUIDE
Metric

American Standard Buttress
Thread Designations
• Whenever possible this description should be
• When only the designation BUTT is used, the confirmed by a simplified view showing thread
thread is a “pull” type buttress (external thread pulls) angles on the drawing of the product that has
with the clearance flank (45˚) leading and the the buttress thread.
pressure flank (7˚) following.
• Always remember that the position of your
• When the designation PUSH-BUTT is used, the holder and direction of your feed will determine
thread is a push type buttress (external thread the lead angle on the insert.
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
rotation rotation nut
0,1632 P 0,0627 P
45˚ clearance flank of this
buttress thread becomes
the leading angle in this
application. 0,3 P
RH bar 0,3 P
A_ -FLER 0,8906P 0,3 P
feed
45˚ clearance angle of this LH insert
buttress thread becomes 45˚ Lead 0,0826 P 1/2 d2 play
chuck the leading angle in this chuck FLTB-2LB 45˚
FLTB-3LB
RH insert application. FLTB-4LB 7˚ 0,1632 P
45˚ Lead 1/2 d1 play screw
FLTB-2RB
FLTB-3RB LH holder 45°
FLTB-4RB FLEL Use: fittings and pipe couplings
RH holder
feed
FLSR
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®*
ACME FLA NA TLA VLA HA PA
ACME STUBFLAS NAS TLAS VLAS HAS PAS
API-NON TOPPING FLD ND TLD # # #
API-TOPPING FLDC NDC TLDC # HDC PDC
UNJ FLJ NJ TLJ # HJ #
UNJ-FINE PITCH FLJF NJF TLJF # HJF #
UNJ-FINE PITCH-POSITIVE FLJK NJK TLJK # # #
UNJ-POSITIVE FLJP NJP TLJP # # #
60˚ V FLT NT TLT VLRT HT PT
AMERICAN STANDARD BUTTRESS FLTB NTB TLTB # HTB #
UN - UNIFIED FLTC NTC TLTC VLTC HTC PTC
60˚ V - FINE PITCH FLTF NTF TLTF VLTF HTF PTF
60˚ V - FINE PITCH POSITIVE FLTK NTK TLTK VLTK HTK PTK
60˚ V - POSITIVE FLTP NTP TLTP VLTP HTP PTP
*Top Clamp change is required when converting from SANDVIK®

46 ISCAR