818 series BBH pull counter boring head (BBH-08D38.10-42.30)

COUNTER BORING · 818 SERIES

BBH pull counter boring headPull boring for straight, true bores.

BBH is a pull counter boring head that machines while being pulled, using the existing hole as a guide. It vibrates less than a pushed tool, so the hole axis does not drift, and because it is under tension the tool does not bend, even in deep holes.

Find by diameter Catalogue PDF

RANGE: Ø38.10 – 165.60 mm
METHOD: Pull
STOCK: Listed sizes in stock
INSERT: TXN (cartridge CTX-LS)
PADS: Pad shoes · fibre pads

FEATURES

Straighter on the pull.Why BBH.

Features of the BBH series, as described in the 2026 BTA Solution catalogue.

CONCENTRICITY

High concentricity and straightness

Pulled through, with the existing hole as its guide, the head vibrates less than a pushed tool and the hole axis does not drift.

SURFACE

Fine surface finish

Fibre pads absorb vibration and leave a smooth bore wall.

LONG BORE

Stable in long holes

By design the tool is under tension, so it does not bend and machines deep holes stably.

CHIP FLOW

Efficient chip evacuation

The chip evacuation design improves productivity.

SPECIFICATIONS

SpecificationsFind a head by diameter.

Within each diameter range, the diameter is set by the pad shoe thickness (S · S1 · S2). Values are as in the original 2026 BTA Solution catalogue.

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

Pull counter boring BBH
Order code	Tube ODmm	dmm	Lmm	Adjustment range	Pad shoes	Cartridge	Insert	Support pad
BBH-08D38.10-42.30	33.0	30.0	168.00	-	818-10-0720-S	CTX16-K-LS	TXN 160408	LNXT 0720-SUP
				2 mm	818-10-0720-S1
				4.2 mm	818-10-0720-S2
BBH-08D42.30-46.50	33.0	30.0	168.00	-	818-10-0720-S	CTX16-K-LS	TXN 160408	LNXT 0720-SUP
				2 mm	818-10-0720-S1
				4.2 mm	818-10-0720-S2
BBH-08D46.50-50.80	33.0	30.0	168.00	-	818-10-0720-S	CTX16-K-LS	TXN 160408	LNXT 0720-SUP
				2 mm	818-10-0720-S1
				4.2 mm	818-10-0720-S2
BBH-11D50.80-55.00	43.0	39.0	186.00	-	818-10-1030-S	CTX16-K-LS	TXN 160408	LNXT 1030-SUP
				2 mm	818-10-1030-S1
				4.2 mm	818-10-1030-S2
BBH-11D55.00-59.20	43.0	39.0	186.00	-	818-10-1030-S	CTX16-K-LS	TXN 160408	LNXT 1030-SUP
				2 mm	818-10-1030-S1
				4.2 mm	818-10-1030-S2
BBH-11D59.20-63.50	43.0	39.0	186.00	-	818-10-1030-S	CTX16-K-LS	TXN 160408	LNXT 1030-SUP
				2 mm	818-10-1030-S1
				4.2 mm	818-10-1030-S2
BBH-13D63.50-67.70	51.0	47.0	186.00	-	818-10-1235-S	CTX16-K-LS	TXN 160408	LNXT 1235-SUP
				2 mm	818-10-1235-S1
				4.2 mm	818-10-1235-S2
BBH-13D67.70-71.90	51.0	47.0	190.50	-	818-10-1235-S	CTX16-K-LS	TXN 160408	LNXT 1235-SUP
				2 mm	818-10-1235-S1
				4.2 mm	818-10-1235-S2
BBH-13D71.90-76.20	51.0	47.0	190.50	-	818-10-1235-S	CTX16-K-LS	TXN 160408	LNXT 1235-SUP
				2 mm	818-10-1235-S1
				4.2 mm	818-10-1235-S2
BBH-16D76.20-88.90	68.0	63.0	270.00	6.35 mm	818-12-065-S	CTX25-K-LS	TXN 250408	LNXT35 D075-SUP
BBH-16D76.20-88.90	68.0	63.0	270.00	12.7 mm	818-12-065-S1	CTX25-K-LS	TXN 250408	LNXT35 D075-SUP
BBH-18D88.90-101.60	82.0	77.0	310.00	6.35 mm	818-12-065-S	CTX25-K-LS	TXN 250408	LNXT35 D085-SUP
BBH-18D88.90-101.60	82.0	77.0	310.00	12.7 mm	818-12-065-S1	CTX25-K-LS	TXN 250408	LNXT35 D085-SUP
BBH-19D101.60-117.60	94.0	89.0	330.00	8.0 mm	818-16-110-S	CTX40-K-LS	TXN 400408	LNXT50 D100-SUP
BBH-19D101.60-117.60	94.0	89.0	330.00	16.0 mm	818-16-110-S1	CTX40-K-LS	TXN 400408	LNXT50 D100-SUP
BBH-19D117.60-133.60	94.0	89.0	330.00	8.0 mm	818-16-110-S	CTX40-K-LS	TXN 400408	LNXT50 D100-SUP
BBH-19D117.60-133.60	94.0	89.0	330.00	16.0 mm	818-16-110-S1	CTX40-K-LS	TXN 400408	LNXT50 D100-SUP
BBH-19D133.60-149.60	94.0	89.0	380.00	8.0 mm	818-16-110-S	CTX40-K-LS	TXN 400408	LNXT50 D130-SUP
BBH-19D133.60-149.60	94.0	89.0	380.00	16.0 mm	818-16-110-S1	CTX40-K-LS	TXN 400408	LNXT50 D130-SUP
BBH-20D149.60-165.60	106.0	101.0	400.00	8.0 mm	818-16-110-S	CTX40-K-LS	TXN 400408	430.32-16D140.00
BBH-20D149.60-165.60	106.0	101.0	400.00	16.0 mm	818-16-110-S1	CTX40-K-LS	TXN 400408	430.32-16D140.00

Products or tube types not listed here can be made to order.

PARTS

Components.Pads · cartridges · inserts.

Components by order code, with pad shoe and cartridge sizes.

Components by order code
Order code	Support pad screw	Sub guide pad	Blank fibre pad	Sub guide pad screw	Blank fibre pad screw
BBH-08D38.10-42.30	416.1-832-M3.0	142030-F	5571 001-05	5513 020-01-M3.5	CML-0306
BBH-08D42.30-46.50	416.1-832-M3.0	142030-F	5571 001-05	5513 020-01-M3.5	CML-0306
BBH-08D46.50-50.80	416.1-832-M3.0	142030-F	5571 001-05	5513 020-01-M3.5	CML-0306
BBH-11D50.80-55.00	416.1-833-M3.5	142067-F	5571 001-06	5513 020-01-M3.5	CML-0410
BBH-11D55.00-59.20	416.1-833-M3.5	142067-F	5571 001-06	5513 020-01-M3.5	CML-0410
BBH-11D59.20-63.50	416.1-833-M3.5	142067-F	5571 001-06	5513 020-01-M3.5	CML-0410
BBH-13D63.50-67.70	416.1-833-M3.5	142067-F	5571 001-06	5513 020-01-M3.5	CML-0410
BBH-13D67.70-71.90	416.1-833-M3.5	142067-F	5571 001-06	5513 020-01-M3.5	CML-0410
BBH-13D71.90-76.20	416.1-833-M3.5	142067-F	5571 001-06	5513 020-01-M3.5	CML-0410
BBH-16D76.20-88.90	5513 020-01-M3.5	142067-F	5571 001-07	5513 020-01-M3.5	CML-0512
BBH-18D88.90-101.60	5513 020-01-M3.5	142067-F	5571 001-08	5513 020-01-M3.5	CML-0614
BBH-19D101.60-117.60	5513 020-26-M5.0	142067-F	5571 001-09	5513 020-01-M3.5	CML-0614
BBH-19D117.60-133.60	5513 020-26-M5.0	202582-F	5571 001-09	5513 020-26-M5.0	CML-0614
BBH-19D133.60-149.60	5513 020-26-M5.0	202582-F	5571 001-10	5513 020-26-M5.0	CML-0816
BBH-20D149.60-165.60	5513 020-26-M5.0	202582-F	5571 001-10	5513 020-26-M5.0	CML-0816

Pad shoes
Pad shoes	Imm	Wmm	Smm	Screw	Driver
818-10-0720-S	26	10	1.5	-	—
818-10-0720-S1	26	10	2.5	-	—
818-10-0720-S2	26	10	3.6	-	—
818-10-1030-S	36	15	2	-	—
818-10-1030-S1	36	15	3	-	—
818-10-1030-S2	36	15	4.1	-	—
818-10-1235-S	41	17	2	-	—
818-10-1235-S1	41	17	3	-	—
818-10-1235-S2	41	17	4.1	-	—
818-12-065-S	48	22	6.5	CML-0410	L-3.0
818-12-065-S1	48	22	10	CML-0410	L-3.0
818-16-110-S	65	32	11	CML-0515	L-3.0
818-16-110-S1	65	32	15	CML-0515	L-3.0

Cartridge
Cartridge	Insert	Fmm	Lmm	Insert screw	Insert screw driver	Cartridge screw	Cartridge screw driver
CTX16-K-LS	TXN160408-G-L	16	32	5513 020-02-M4	TORX PLUS-T15	CML-0515	L-4.0
CTX25-K-LS	TXN250408-G-L	24	54	5513 020-55-M5	TORX PLUS-T20	CML-0825	L-6.0
CTX40-K-LS	TXN400708-G-L	32	56	5513 020-14-M6	TORX PLUS-T25	CML-1030	L-8.0

Inserts (TXN)
Insert	Imm	Wmm	Smm
TXN160408-G-L	10.9	11.9	4.76
TXN250408-G-L	17.2	18.8	4.76
TXN400708-G-L	23.5	25.5	7.00

Recommended insert grades
Material	1st-choice grade	2nd-choice grade
Steel (P)	HM3	SM3
Stainless steel (M)	SM3	IM3
Cast iron (K)	HM3	SM3
Non-ferrous metals (N)	SM3	IM3
Difficult-to-cut materials · heat-resistant alloys (S)	IM3	SM3

SHIM SETS

Shim sets.Set the diameter by thickness.

Shims behind the cartridges and pads fine-tune the diameter.

Cartridge shims
Cartridge	Thicknessmm	Part no.
CTX16-K-LS	0.05 · 0.1 · 0.2 · 0.3 · 0.5 (4 pcs each)	CX-160420
CTX25-K-LS	0.05 · 0.1 · 0.2 · 0.3 · 0.5 (4 pcs each)	CX-250420
CTX40-K-LS	0.05 · 0.1 · 0.2 · 0.3 · 0.5 (4 pcs each)	CX-400420

Pad shoe shims
Pad shoes	Thicknessmm	Part no.
818-12-065-S	0.05 · 0.1 · 0.2 · 0.3 · 0.5 (4 pcs each)	818-12-650420
818-16-110-S	0.05 · 0.1 · 0.2 · 0.3 · 0.5 (4 pcs each)	818-16-110420
818-18-300-R	0.05 · 0.1 · 0.2 · 0.3 · 0.5 (4 pcs each)	818-18-300420
818-26-500-R	0.05 · 0.1 · 0.2 · 0.3 · 0.5 (4 pcs each)	818-26-500420

Fibre guide pad shims
Fibre guide pad	Thicknessmm	Part no.
142067-F	0.05 · 0.1 · 0.2 · 0.3 · 0.5 (4 pcs each)	670420F
202582-F	0.05 · 0.1 · 0.2 · 0.3 · 0.5 (4 pcs each)	820420F

Support pad shims (LNXT)
Support pad	Thicknessmm	Part no.
LNXT 0618-SUP	0.02 · 0.03 · 0.05 (4 pcs each)	800-060420
LNXT 0720-SUP	0.02 · 0.03 · 0.05 (4 pcs each)	800-070420
LNXT 0825-SUP	0.02 · 0.03 · 0.05 (4 pcs each)	800-080420
LNXT 1030-SUP	0.02 · 0.03 · 0.05 (4 pcs each)	800-100420
LNXT 1235-SUP	0.02 · 0.03 · 0.05 (4 pcs each)	800-120420

Support pad shims (LNXT35 · 50)
Support pad	Thicknessmm	Part no.
LNXT35DXXX-SUP	0.05 · 0.1 · 0.2 · 0.3 · 0.5 (4 pcs each)	0350420
LNXT50DXXX-SUP	0.05 · 0.1 · 0.2 · 0.3 · 0.5 (4 pcs each)	0500420

Blank fibre pad
Blank fibre pad	Thicknessmm	Part no.
5571 001-08	1.0 (3 pcs each)	00108-1
5571 001-09	1.0 (3 pcs each)	00109-1
5571 001-10	1.0 (3 pcs each)	00110-1
5571 001-11	1.0 (3 pcs each)	00111-1
5571 001-12	1.0 (3 pcs each)	00112-1

COUNTER BORING LINE-UP

For other diameters.Counter boring line-up.

One diameter range, two methods: push (TBH) and pull (BBH).

TBH818 · push · Ø38.10 – 165.60
BBH818 · pull · Ø38.10 – 165.60

All Counter boring

Need a diameter over Ø165.60 mm?Send us the drawing.

Tell us the existing hole diameter, target diameter, depth and machine, and we will suggest the right head.

+82-31-430-7094