SHRINK FIT
BT40 SHRINK FIT HOLDERS
FEATURES • Excellent surface finish, extreme gripping and ideal for high-speed applications • Pre-balanced up to 25,000 RPM • Increase cutting tool life, material removal rate and workpiece accuracy • All shrink fit holders 6mm (1/4") and above include a backup screw MATERIAL: H11 High Alloy Steel HARDNESS: 52 HRc tempered
T.I.R. 0.0001 " in ID bore Speed Up to 25,000 rpm
RPM
COOLANT-THRU Coolant-Thru
Plugable Coolant Ports
MILLING
DRILLING REAMING
Please note that the maximum RPM listed in our catalog may vary depending on the toolholder shank, weight, balanceability and the G rating.
D1 D d
STANDARD Part Number BT40-SF0125-3.54 BT40-SF0125-5.12 BT40-SF0187-3.54 BT40-SF0187-5.12
D D1 D2 Max.
d L L1
RPM Fig.
1/8" 3.54" 2.00" 0.39" 0.71" -
25K 4
L1
1/8" 5.12" 2.00" 0.39" 0.71" 0.84" 25K 5
L
3/16" 3.54" 1.50" 0.83" 1.06" -
25K 4
3/16" 5.12" 2.25" 0.39" 0.75" 0.87" 25K 5
STANDARD COOLANT PORTED Part Number d L L1
L
D D1 D2 Max.
RPM Fig.
Fig. 4
BT40-SF0250-3.54CP BT40-SF0250-5.12CP BT40-SF0312-3.54CP BT40-SF0312-5.12CP BT40-SF0375-3.54CP BT40-SF0375-5.12CP BT40-SF0500-3.54CP BT40-SF0500-5.12CP BT40-SF0625-3.54CP BT40-SF0750-3.54CP BT40-SF1000-3.94CP
1/4" 3.54" 1.50" 0.83" 1.06" -
25K 4
1/4" 5.12" 1.50" 0.83" 1.06" 1.23" 25K 5
D1 D2 D
5/16" 3.54" 1.50" 0.83" 1.06" -
25K 4
5/16" 5.12" 1.50" 0.83" 1.06" 1.23" 25K 5
d
3/8" 3.54" 2.00" 0.95" 1.26" -
25K 4
L1
3/8" 5.12" 2.00" 0.95" 1.26" 1.39" 25K 5
1/2" 3.54" 2.00" 0.95" 1.26" -
25K 4
L
1/2" 5.12" 2.00" 0.95" 1.26" 1.39" 25K 5
5/8" 3.54" 1.75" 1.06" 1.34" - 3/4" 3.54" 2.00" 1.30" 1.61" - 1" 3.94" 2.00" 1.73" 2.05" -
25K 4 25K 4 25K 4
Fig. 5
" CP " stands for " Coolant Ported " . Shrink fit is center-thru coolant capable. Contact us for additional coolant options.
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