800 series DHD BTA drill head (DHD-09D39.96) — centre, intermediate and peripheral inserts and support pad

BTA DRILLING · 800 SERIES

DHD drill headØ25–65 mm, the most-used diameters.

The 800 series DHD is a BTA drill head for Ø25.00–65.00 mm, the range used most in deep hole drilling. We build it for both single-tube (STS) and ejector (EJECTOR) machines, and many sizes are kept in stock.

Find by diameter Catalogue PDF
RANGE
Ø25.00 – 65.00 mm
SYSTEM
STS 800.20 · EJECTOR 800.24
THREAD
4-start thread
INSERTS
Centre · intermediate · peripheral + support pad
STOCK
Many sizes in stock

FEATURES

Straight, even in deep holes.Four strengths of the 800 series.

Features of the 800 series, as listed in the 2026 BTA Solution catalogue.

Ø25 – Ø65

The most-used diameter range

One series covers Ø25.00–65.00 mm, the range in highest demand. Many sizes are kept in stock.

RIGIDITY

High rigidity

A rigid design suppresses vibration, keeping straightness and precision even in deep holes.

CHIP FLOW

Clog-free chip evacuation

Optimised chip channels let the head drill without clogging. Faster drilling raises efficiency.

MATERIALS

Wide range of materials

Handles high-alloy steels, difficult-to-cut materials and more, for use across many industries.

SPECIFICATIONS

SpecificationsEnter a diameter to find the right head.

Choose the hole diameter and system to see the product code, tube OD, inserts and support pad at once. Values are taken from the original 2026 BTA Solution catalogue.

DHD head dimension drawing — overall length L and dimension d in the side view, hole diameter D in the front view
D = hole diameter · d, L = dimensions in the table (catalogue drawing)

System

Enter a diameter and press Find. Matching sizes appear here, and their rows are highlighted in the table below.

STS single tube system (800.20)
Diameter range DmmTube ODmmProduct codedmmLmmCentreIntermediatePeripheralSupport pad
25.00~26.4022.0DHD-03D**.**19.573LPMT050308C-G-LLPMT050308I-G-LLPET060308P-G-LLNXT0618-SUP
26.41~28.7024.0DHD-04D**.**2174LPMT050308C-G-LLPMT050308I-G-LLPET060308P-G-LLNXT0618-SUP
28.71~31.0026.0DHD-05D**.**23.575LPMT06T308C-G-LLPMT050308I-G-LLPET060308P-G-LLNXT0618-SUP
31.01~33.3028.0DHD-06D**.**25.576LPMT06T308C-G-LLPMT06T308I-G-LLPET08T308P-G-LLNXT0720-SUP
33.31~36.2030.0DHD-07D**.**28.077LPMT06T308C-G-LLPMT06T308I-G-LLPET08T308P-G-LLNXT0720-SUP
LPMT08T308C-G-LLPMT08T308I-G-L
36.21~39.6033.0DHD-08D**.**30.089LPMT08T308C-G-LLPMT08T308I-G-LLPET08T308P-G-LLNXT0720-SUP
LPET09T308P-G-L
39.61~43.0036.0DHD-09D**.**33.093LPMT08T308C-G-LLPMT08T308I-G-LLPET09T308P-G-LLNXT0825-SUP
43.01~47.0039.0DHD-10D**.**36.095LPMT10T308C-G-LLPMT08T308I-G-LLPET09T308P-G-LLNXT0825-SUP
47.01~51.7043.0DHD-11D**.**39.0102LPMT12T308C-G-LLPMT08T308I-G-LLPET09T308P-G-LLNXT1030-SUP
LPMT10T308C-G-LLPET11T308P-G-L
51.71~56.2047.0DHD-12D**.**43.0110LPMT10T308C-G-LLPMT08T308I-G-LLPET11T308P-G-LLNXT1030-SUP
LPMT12T308I-G-LLNXT1235-SUP
56.21~65.0051.0DHD-13D**.**47.0115LPMT10T308C-G-LLPMT12T308I-G-LLPET11T308P-G-LLNXT1235-SUP
LPMT12T308C-G-L
60.61~65.0057.0DHD-13E**.**51.0115LPMT12T308C-G-LLPMT12T308I-G-LLPET11T308P-G-LLNXT1235-SUP
  • The hole diameter goes in the **.** position of the product code. Example: DHD-09D39.96 = Ø39.96 mm head.
  • Where a diameter range has two rows, the catalogue lists two insert and pad combinations. We confirm the exact combination when you request a quote.
  • For diameters not in the table or special specifications, please send an enquiry with your drawing.

PARTS

Components.Insert · pad · screw codes.

The head carries three inserts (centre, intermediate and peripheral) and a support pad, all screw-clamped so each can be replaced separately.

800 series DHD head exploded view — ① centre ② intermediate ③ peripheral insert, ④ support pad, ⑤ support pad shim
800 series exploded view (2026 BTA Solution catalogue)

Components

  1. 1CentreLPMT···C-G-L
  2. 2IntermediateLPMT···I-G-L
  3. 3PeripheralLPET···P-G-L
  4. 4Support padLNXT···-SUP
  5. 5Support pad shim800-······
800 series insert · pad sizes (by diameter range)
Centre rangemmCentreIntermediate rangemmIntermediatePeripheral rangemmPeripheralPad rangemmSupport pad
25.00~28.70LPMT050308C-G-L25.00~31.00LPMT050308I-G-L25.00~31.00LPET060308P-G-L25.00~31.00LNXT0618-SUP
28.71~33.99LPMT06T308C-G-L31.01~34.99LPMT06T308I-G-L31.01~38.99LPET08T308P-G-L31.01~39.60LNXT0720-SUP
34.00~43.00LPMT08T308C-G-L35.00~54.99LPMT08T308I-G-L39.00~49.99LPET09T308P-G-L39.61~47.00LNXT0825-SUP
43.01~47.00LPMT10T308C-G-L55.00~65.00LPMT12T308I-G-L50.00~65.00LPET11T308P-G-L47.01~54.99LNXT1030-SUP
47.01~49.99LPMT12T308C-G-L————55.00~65.00LNXT1235-SUP
50.00~57.99LPMT10T308C-G-L——————
58.00~65.00LPMT12T308C-G-L——————
800 series screws
Diameter rangemmCentreIntermediatePeripheralInsert screw driverSupport pad screwPad screw driver
25.00-28.705513 020-05-M2.25513 020-05-M2.25513 020-05-M2.2TORX PLUS T-75513 020-20-M2.5TORX PLUS T-7
28.71-31.005513 020-34-M2.55513 020-05-M2.25513 020-05-M2.2TORX PLUS T-75513 020-20-M2.5TORX PLUS T-8
31.01-39.605513 020-34-M2.55513 020-34-M2.55513 020-34-M2.5TORX PLUS T-8416.1-832-M3.0TORX PLUS T-9
39.61-47.005513 020-34-M2.55513 020-34-M2.55513 020-34-M2.5TORX PLUS T-85513 020-16-M3.5TORX PLUS T-10
47.01-65.005513 020-34-M2.55513 020-34-M2.55513 020-34-M2.5TORX PLUS T-8416.1-833-M3.5TORX PLUS T-10
800 series accessories (support pad shims)
Support padThicknessmmPart no.
LNXT 0618-SUP0.02 · 0.03 · 0.05 (4 pcs each)800-060420
LNXT 0720-SUP0.02 · 0.03 · 0.05 (4 pcs each)800-070420
LNXT 0825-SUP0.02 · 0.03 · 0.05 (4 pcs each)800-080420
LNXT 1030-SUP0.02 · 0.03 · 0.05 (4 pcs each)800-100420
LNXT 1235-SUP0.02 · 0.03 · 0.05 (4 pcs each)800-120420

INSERTS & GRADES

Inserts and grades.LPMT · LPET inserts, LNXT pads.

Choose the 1st-choice grade for your workpiece material; use the 2nd choice when conditions are demanding.

Centre inserts (LPMT···C)
InsertImmWmmSmmRmm
LPMT050308C-G,L9.875.563.180.8
LPMT06T308C-G,L9.876.353.970.8
LPMT08T308C-G,L9.877.943.970.8
LPMT10T308C-G,L9.879.533.970.8
LPMT12T308C-G,L9.8712.73.970.8
Intermediate inserts (LPMT···I)
InsertImmWmmSmmRmm
LPMT050308I-G,L9.875.563.180.8
LPMT06T308I-G,L9.876.353.970.8
LPMT08T308I-G,L9.877.943.970.8
LPMT12T308I-G,L9.8712.73.970.8
Peripheral inserts (LPET···P)
InsertImmWmmSmmRmm
LPET060308P-G,L8.06.423.180.8
LPET08T308P-G,L9.08.623.970.8
LPET09T308P-G,L9.09.633.970.8
LPET11T308P-G,L9.012.73.970.8
Support pads (LNXT···-SUP)
Support padImmWmmSmm
LNXT0618-SUP1863.0
LNXT0720-SUP2073.5
LNXT0825-SUP2584.5
LNXT1030-SUP30104.5
LNXT1235-SUP35125.5
Recommended insert grades
Material1st-choice grade2nd-choice grade
Steel (P)HM3SM3
Stainless steel (M)SM3IM3
Cast iron (K)HM3SM3
Non-ferrous metals (N)SM3IM3
Difficult-to-cut materials · heat-resistant alloys (S)IM3SM3
Recommended support pad grades
Material1st-choice grade2nd-choice grade
Steel (P)PM3IM3
Stainless steel (M)IM3PM3
Cast iron (K)PM3IM3
Non-ferrous metals (N)IM3PM3
Difficult-to-cut materials · heat-resistant alloys (S)IM3PM3

SYSTEM

For both tube systems.STS 800.20 · EJECTOR 800.24

See how deep hole drilling works

STS · Single tube (800.20)

Product code DHD-□□D

SYSTEM
Single tube
COOLANT
Outside the tube → head
CHIPS
Out through the tube

Coolant is pushed in around the tube and carries the chips back out through it. Because the chips stay off the finished wall, the hole keeps its straightness and finish, even deep down.

EJECTOR · Double tube (800.24)

Product code E-DHD-□□D

SYSTEM
Double tube
COOLANT
Between outer and inner tubes
CHIPS
Drawn into the inner tube
MACHINE
Lathes · machining centres

Part of the coolant fed between the two tubes is jetted backwards, creating suction that draws the chips out. No sealed pressure head is needed, so deep holes can be drilled on conventional lathes and machining centres.

BTA DRILLING LINE-UP

For other diameters.BTA drilling line-up.

Below Ø25 mm choose the GHD; above Ø65 mm, the LHD or THD. The 500 series sets its diameter with cartridges.

All BTA drilling

Need a size that isn’t listed?Send us the drawing.

Tell us the workpiece material, hole diameter, depth and machine, and we will suggest the right tool.

+82-31-430-7094