01
CBH Finish Boring Tool / Micro Fine Boring Tool
derekDCK Modular Boring Tools
High Precision, High Strength and Easy Operation--the Best Style of Connection

● Change locking force to axial tension by using 30°taper screws. The boring head and arbor would be attached closely. (Fig A)
● Modular design makes the setting of boring range and depth more easier. Reducers, extensions and chamfering rings provide multifunctional work. (Fig B)
● High working efficiency brings down the production cost due to high precision of connection.
derekCBH Micro Boring Tools- Characteristics
01
Adjusting rate 0.01mm, adjusting rate reaches 0.001mm by vernier scale.
Cartridge have two different inserts TC and TP for option. Cartridge could be mounted in opposite direction for back boring.
The small diameter tools with range of 20-203mm use CK connector, which compatible with mainstream products on the market.
The large diameter tools with range of 148-1275mm use the bridge structure, with 70%-90% aluminium, rigid structure and lightweighting, which make cutting more efficient and stable.
External boring tools have CBH-M and CBH-L for option, which can reach external boring range: 13-715mm.
All series have internal cooling design, which is easy for chip removal, easily cooling, and ensures machining stability.
| Specification | Figure | Boring head | Specification | Figure | Boring head | Specification | Figure | Boring head | |||
| CBH | 1-1 |
TPGH0802 |
DCK1- CBH20-36 | CBH | 4-1 |
TCMT1102 (With) TPGH1103 (For choice) |
DCK4- CBH41-74 | CBH | 1-1 |
TCMT1102 (For choice) |
DCK4- CBH41-74 |
| 1-2 | 4-2 | 1-2 | |||||||||
| 1-3 | 4-3 | 1-3 | |||||||||
| 2-1 | DCK2- CBH25-47 | 5-1 | DCK5- CBH53-95 | 2-1 | DCK4- CBH41-74 | ||||||
| 2-2 | 5-2 | 2-2 | |||||||||
| 2-3 | 5-3 | 2-3 | |||||||||
| 3-1 | DCK3- CBH32-60 | 6-1 | DCK6- CBH68-150 DCK6- CBH100-203 | 3-1 | DCK6- CBH68-150 DCK6- CBH100-203 | ||||||
| 3-2 | 6-2 | 3-2 | |||||||||
| 3-3 | 6-3 | 3-3 | |||||||||
Notice: Cartridge CBHx-1 is included in quotation,while CBHX-2 and CBHX-3 shall be ordered separately.
derekCBH Back-Boring Instructions
01
In order to check the feasibility of the back boring operation and select the best tool combination, these values should be calculated as follows:
C >(D+d)/2
C: Minimum entry bore diameter
D: Back bore diameter
d: Diameter of boring head
Anti-clockwise spindle rotation required.
derekCBH Finish Boring Tool

| Specification | Boring | Range | Back boring | Range | Cartridge | Insert | Screw | Wrench | Weight | |||
| L1 | L | B | L2 | L3 | ||||||||
| DCK1-CBH20-36 | 29.5 | 32.5 | 20-26 | 10 | 10.5 | 19 | - | CBH1-1 | TPGH0802 | M020D055 | Q06 | 0.06 |
| 29.5 | 32.5 | 25-31 | 10 | 10.5 | 19 | 30-31 | CBH1-2 | 0.06 | ||||
| 29.5 | 32.5 | 30-36 | 10 | 10.5 | 19 | 30-36 | CBH1-3 | 0.06 | ||||
| DCK2-CBH25-47 | 32.5 | 35.5 | 25-33 | 12.5 | 11.5 | 21 | - | CBH2-1 | 0.12 | |||
| 32.5 | 35.5 | 32-40 | 12.5 | 11.5 | 21 | 36-40 | CBH2-2 | 0.12 | ||||
| 32.5 | 35.5 | 39-47 | 12.5 | 11.5 | 21 | 39-47 | CBH2-3 | 0.12 | ||||
| DCK3-CBH32-60 | 35 | 40 | 32-42 | 16 | 10 | 25 | - | CBH3-1 | 0.20 | |||
| 35 | 40 | 41-51 | 16 | 10 | 25 | 46-51 | CBH3-2 | 0.20 | ||||
| 35 | 40 | 50-60 | 16 | 10 | 25 | 50-60 | CBH3-3 | 0.20 | ||||
| DCK4-CBH41-74 | 43 | 47 | 41-54 | 20 | 14 | 29 | - | CBH4-1 | TCMT1102 (With) TPGH1103 (For choice) | M025W060 M030W070 | Q08 | 0.39 |
| 43 | 47 | 50-63 | 20 | 14 | 29 | 53-63 | CBH4-2 | 0.39 | ||||
| 43 | 47 | 61-74 | 20 | 14 | 29 | 61-74 | CBH4-3 | 0.39 | ||||
| DCK5-CBH53-95 | 53 | 57 | 53-70 | 25.5 | 19 | 34 | 62-70 | CBH5-1 | 0.80 | |||
| 53 | 57 | 65-82 | 25.5 | 19 | 34 | 65-82 | CBH5-2 | 0.80 | ||||
| 53 | 57 | 78-95 | 25..5 | 19 | 34 | 78-95 | CBH5-3 | 0.80 | ||||
| DCK6-CBH100-203 | 67.2 | 71 | 68-100 | 32.5 | 22 | 45.2 | 80-100 | CBH6-1 | 1.80 | |||
| 67.2 | 71 | 94-126 | 32.5 | 22 | 45.2 | 94-126 | CBH6-2 | 1.80 | ||||
| 67.2 | 71 | 118-150 | 32.5 | 22 | 45.2 | 118-150 | CBH6-3 | 1.80 | ||||
| DCK6-CBH68-150 | 67.2 | 71 | 100-153 | 45.5 | 22 | 45.2 | 112-153 | CBH6-1 | 2.53 | |||
| 67.2 | 71 | 126-179 | 45.5 | 22 | 45.2 | 126-179 | CBH6-2 | 2.53 | ||||
| 67.2 | 71 | 150-203 | 45.5 | 22 | 45.2 | 150-203 | CBH6-3 | 2.53 | ||||
| DCK7-CBH100-203 | 83.2 | 87 | 100-153 | 45.5 | 22 | 45.2 | 112-153 | CBH6-1 | 3.96 | |||
| 83.2 | 87 | 126-179 | 45.5 | 22 | 45.2 | 126-179 | CBH6-2 | 3.96 | ||||
| 83.2 | 87 | 150-203 | 45.5 | 22 | 45.2 | 150-203 | CBH6-3 | 3.96 | ||||
Suitable: DEREK、KYOCERA Or SUMITOMO Insert
Feature:
● With internal cooling supply.
● With balanced structure for high machining precision accuracy.
● High effectiveness with back-boring function.
● With side scale for adujustment of μm grade.
derekproduct dispaly
derekFM-CBH Large Diameter Boring Tool For Finishing

| Specification | Boring range | H | Adapter size | B-Boring range | Work depth | Insert | Weight |
| FMS-CBH148215 | 148-215 | 109 | FMS | 23-90 | 30 | TCMT1102 / TPGH1103 | 3.18 |
| FMS-CBH198265 | 198-265 | 109 | FMS | 73-140 | 30 | 3.71 | |
| FMS-CBH248315 | 248-315 | 109 | FMS | 123-190 | 30 | 4.19 |
| Specification | Picture | Insert | Screw | Wrench | Weight | ||
| CBH5-1-TC-V | ![]() |
TCMT1102 | M025W060 | Q08 | 0.04 | ||
| CBH5-1-TP-V | TPGH1103 | M030W070 | Q08 | 0.04 | |||
Suitable: DEREK、KYOCERA Or SUMITOMO Insert
| Item | Specification | Picture | Weight | ||||
| Adapter size | HSK-A-FMS | ![]() |
- | ||||
| BT-FMS | - | ||||||
| SK-FMS | - | ||||||
| BBT-FMS | - | ||||||
| CAT-FMS | - | ||||||
| Extension Aluminum bridge | FMS40-148 | ![]() |
1.46 | ||||
| FMS40-198 | 1.99 | ||||||
| FMS40-248 | 2.47 | ||||||
| Finish boring Aluminum slider | ![]() |
||||||
| FMA34-S17 | 0.29 | ||||||
| Finish boring head | ![]() |
||||||
| A34-CBH5395 | 0.55 | ||||||
| Balancing Aluminum weight | ![]() |
||||||
| FMA34-S17-PZK | 0.86 | ||||||
Feature:
■ 70-90% of material is made from Aluminum.
■ With internal cooling supply.
■ Balanced: G6.3;1,000 rpm.
derekFM-CBH Large Diameter Boring Tool For Finishing

| Specification | Boring range | H | Adapter size | B-Boring range | Work depth | Insert | Weight |
| FMX-CBH298395 | 298-395 | 113 | FMX | 173-270 | 25 | TCMT1102 / TPGH1103 | 9.50 |
| FMX-CBH378475 | 378-475 | 118 | FMX | 253-350 | 25 | 11.26 | |
| FMX-CBH458555 | 458-555 | 123 | FMX | 333-430 | 25 | 13.19 |
| Specification | Picture | Insert | Screw | Wrench | Weight | ||
| CBH5-1-TC-V | ![]() |
TCMT1102 | M025W060 | Q08 | 0.04 | ||
| CBH5-1-TP-V | TPGH1103 | M030W070 | Q08 | 0.04 | |||
Suitable: DEREK、KYOCERA Or SUMITOMO Insert
| Item | Specification | Picture | Weight | ||||
| Adapter size | HSK-A-FMX | ![]() |
- | ||||
| BT-FMX | - | ||||||
| SK-FMX | - | ||||||
| BBT-FMX | - | ||||||
| CAT-FMX | - | ||||||
| Extension Aluminum bridge | FMX40-298 | ![]() |
5.33 | ||||
| FMX40-378 | 7.09 | ||||||
| FMX40-458 | 9.02 | ||||||
| Finish boring slider | ![]() |
||||||
| FMA34-S24-PZK | 1.02 | ||||||
| Finish boring head | ![]() |
||||||
| A34-CBH5395 | 0.55 | ||||||
| Balancing weight | ![]() |
||||||
| FMA34-S24-PZK | 1.56 | ||||||
Feature:
■ 70-90% of material is made from Aluminum.
■ With internal cooling supply.
■ Balanced: G6.3;1,000 rpm.
derekFM-CBH Large Diameter Boring Tool For Finishing

| Specification | Boring range | H | Adapter size | B-Boring range | Work depth | Insert | Weight |
| FMX-CBH538795 | 538-795 | 197 | FMX | 413-670 | 25 | TCMT1102 / TPGH1103 | 25.64 |
| FMX-CBH7781035 | 778-1035 | 217 | FMX | 653-910 | 25 | 36.83 | |
| FMX-CBH10181275 | 1018-1275 | 217 | FMX | 893-1150 | 25 | 44.26 |
| Specification | Picture | Insert | Screw | Wrench | Weight | ||
| CBH5-1-TC-V | ![]() |
TCMT1102 | M025W060 | Q08 | 0.04 | ||
| CBH5-1-TP-V | TPGH1103 | M030W070 | Q08 | 0.04 | |||
Suitable: DEREK、KYOCERA Or SUMITOMO Insert
| Item | Specification | Picture | Weight | ||||
| Adapter size | HSK-A-FMX | ![]() |
- | ||||
| BT-FMX | - | ||||||
| SK-FMX | - | ||||||
| BBT-FMX | - | ||||||
| CAT-FMX | - | ||||||
| Extension Aluminum bridge | FMX40-538 | ![]() |
14.77 | ||||
| FMX40-778 | 25.96 | ||||||
| FMX40-1018 | 33.39 | ||||||
| Long Aluminum Sider | ![]() |
||||||
| FMA35-S24 | 3.35 | ||||||
| Finish boring slider | ![]() |
||||||
| FMA34-S24 | 1.02 | ||||||
| Finish boring head | ![]() |
||||||
| A34-CBH5395 | 0.55 | ||||||
| Balancing weight | ![]() |
||||||
| FMA34-S24-PZK | 1.56 | ||||||
Feature:
■ 70-90% of material is made from Aluminum.
■ With internal cooling supply.
■ Balanced: G6.3;1,000 rpm.
derekCBH-M Boring Tool For Pin Turning

| Specification | Range Фd | Bridge frame | Side-lock screw | Boring head | Balance weight | Insert holder | Insert | Boring range | Weight |
| DCK6-CBH24-34-M | 24-34 | DCK6-2452-42 114 | M120Z200-30P-D | CBH32-60 | DCK3-CBH | CBH3-3 | TPGH0802 | 134-144 | 1.60 |
| DCK6-CBH33-43-M | 33-43 | CBH32-60 | DCK3-CBH | CBH3-2 | TPGH0802 | 125-135 | 1.60 | ||
| DCK6-CBH42-52M | 42-52 | CBH32-60 | DCK3-CBH | CBH3-1 | TPGH0802 | 116-126 | 1.60 | ||
| DCK6-CBH52-62-M | 52-62 | DCK6-5280-42 142 | M120Z200-30P-D | CBH32-60 | DCK3-CBH | CBH3-3 | TPGH0802 | 162-172 | 1.80 |
| DCK6-CBH61-71-M | 61-71 | CBH32-60 | DCK3-CBH | CBH3-2 | TPGH0802 | 153-163 | 1.80 | ||
| DCK6-CBH70-80-M | 70-80 | CBH32-60 | DCK3-CBH | CBH3-1 | TPGH0802 | 144-154 | 1.80 | ||
| DCK6-CBH80-90-M | 80-90 | DCK6-80108-42 170 | M120Z200-30P-D | CBH32-60 | DCK3-CBH | CBH3-3 | TPGH0802 | 190-200 | 2.00 |
| DCK6-CBH89-99-M | 89-99 | CBH32-60 | DCK3-CBH | CBH3-2 | TPGH0802 | 181-191 | 2.00 | ||
| DCK6-CBH98-108-M | 98-108 | CBH32-60 | DCK3-CBH | CBH3-1 | TPGH0802 | 172-182 | 2.00 |
Suitable: DEREK、KYOCERA Or SUMITOMO Inser
Notice:
1. Boring head have only one cartridge , without insert, please order them separately.
2. Anti-clockwise spindle rotation required.
Feature:
■ CBH boring head loaded opposite direction can process boring machining.
■ Machining rangeФ116-Ф200.
derekCBH-L Boring Tool For Pin Turning (Large Diameter)

| Specification | Range Фd | Flange adapter | Extention bridge | L | Balance weight | Boring head | Boring range | Boring depth | Finish head | Weight |
| DCK6-CBH13-115-L | 13-115 | DCK6-FL200 | DST200 | 180 | DCK4-CB200 | CBH41-74 (CBH4-1) TCMT 1102 With (For choice)TPGH 1103 | 108-192 | 75,Φ<180 | DCK4-CBH | 8.70 |
| DCK6-CBH112-215-L | 112-215 | DCK6-FL200 | DST300 | 280 | DCK4-CB200 | 108-292 | 75,Φ<280 | DCK4-CBH | 10.02 | |
| DCK6-CBH212-315-L | 212-315 | DCK6-FL200 | DST400 | 380 | DCK4-CB200 | 108-392 | 75,Φ<380 | DCK4-CBH | 11.92 | |
| DCK6-CBH312-415-L | 312-415 | DCK6-FL200 | DST500 | 480 | DCK4-CB200 | 108-492 | 75,Φ<480 | DCK4-CBH | 13.82 | |
| DCK6-CBH412-515-L | 412-515 | DCK6-FL200 | DST600 | 580 | DCK4-CB200 | 108-592 | 75,Φ<580 | DCK4-CBH | 15.72 | |
| DCK6-CBH512-615-L | 512-615 | DCK6-FL200 | DST700 | 680 | DCK4-CB200 | 108-692 | 75,Φ<680 | DCK4-CBH | 17.70 | |
| DCK6-CBH612-715-L | 612-715 | DCK6-FL200 | DST800 | 780 | DCK4-CB200 | 108-792 | 75,Φ<780 | DCK4-CBH | 19.60 |
Suitable: DEREK、KYOCERA Or SUMITOMO Insert
Notice:
1. Boring head with one cartridge, without insert, please order it separately.
2. Anti-clockwise spindle rotation required.
derekCBH Boring Head Operation Manual
01
Installation Of Cartridge and Inserts
① Clean the mounting surface of insert holder and boring head;
Mount the insert holder while fitting into the convex on the head;
Make sure there is no gap and misalignment between insert holder and boring head; Fasten the locking screw properly.
For back boring, please mount the insert holder turned over 180°. See Fig. A
Mount the insert holder while fitting into the convex on the head;
Make sure there is no gap and misalignment between insert holder and boring head; Fasten the locking screw properly.
For back boring, please mount the insert holder turned over 180°. See Fig. A
② Use compressed air to clean the surface of inserts and insert pocket on cartridge. Ensure they are free of any dust or oil;
Position the indexable insert on the insert pocket and tighten the clamping screw securely. See Fig. B
Position the indexable insert on the insert pocket and tighten the clamping screw securely. See Fig. B
01
Structure
① DCK Connection
② Boring Head
③ Graduated Dial
④ Locking Screw
⑤ Grease Hole
⑥ Clamping Screw
⑦ Cartridge
01
Usage of graduated dial
① Unlock locking screw(figure 4)
② Clockwise adjust the dial(figure 3), when the dial scale moves one division, 0.01mm added to the boring hole diameter; when the matched line of dial and vernier scale moved one smaller division(as per vernier), 0.001mm added to the boring hole diameter.
③ Lock the locking screw(figure 4).
01
Operating Instructions
Before operation, checking the indexable insert is suitable and the locking screw is fastened securely.
① Loosen the locking screw in anti-clockwise direction;
② Adjust the graduated dial clockwise to increase working diameter.And agdust anti-clockwise to reduce working diameter.
③ Pls the adjustment graduated dial in the same direction as the beginning of rotating when finishing.
④ Tighten the locking screw colockwise properly.
01
Notices Of The User
① Use boring head within suggested range;
② Rotate the graduated dial without loosening the locking screw would cause damage to the internal moving parts of the boring head.
③ Check the following two possible troubles when the rotation meets big resistance or refuses to move:
If the locking screw is loosened.
If the boring diameter exceeds the boring range of boring head.
If the locking screw is loosened.
If the boring diameter exceeds the boring range of boring head.
④ Machine spindle shall be run in anticlockwise direction when back boring is adopted.
⑤ Injecting grease until it overflow from the circumference of the graduated dial. In addition to lubrication, it helps remove infiltrated coolant and impurities;
Pls adjust the graduated dial regularly to avoid grease becoming harden.
Don’t overhauling boring head without instructions from DEREK.
Pls adjust the graduated dial regularly to avoid grease becoming harden.
Don’t overhauling boring head without instructions from DEREK.










TPGH0802
TCMT1102 (For choice)











