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ANSI/ASME B5.50-1985 RETENTION KNOB

Product Features

Precision‑machined for tool holder locking
High‑strength alloy steel construction
Uniform thread tolerance for smooth assembly
Surface treated for wear & corrosion resistance
Strict dimensional consistency for interchangeability
Fits standard tool holder drawbar systems

Selling Points

Reliable locking, avoids tool holder loosening during high‑speed operation
Excellent interchangeability, replace original parts directly
Long service life, reduces frequent part replacement cost
Easy installation, no extra modification required
Stable performance under heavy‑cut conditions

Customer Concerns

Thread size & pitch compatibility
Material hardness and wear resistance
Dimensional tolerance & interchangeability
Locking reliability at high‑speed spindle
Surface treatment quality
Fit for BT / CAT / HSK series tool holders

FAQ

Q1: Is this retention knob universal for all tool holders?A: No. Please match the correct model according to your tool holder standard (BT/CAT/ISO).

Q2: Can it be used for high‑speed machining?A: Yes. Precision manufacturing ensures stable locking under high‑speed working.

Q3: What is the main cause of retention knob failure?A: Over‑torque tightening, heavy wear of thread or contact surface. Regular inspection is recommended.

Q4: Does it come with anti‑rust treatment?A: Yes. Each piece is anti‑rust treated and individually packed.

Q5: Can I replace original brand retention knob directly?A: Yes, if model and dimensions fully match your tool holder specification.

Media Contact:Alisa-Export Manager

Name: Alisa

Title: Export Manager

Phone/Whatapp/Wechat: +86‑15288891522

Email: ht06@ht-tools.net

alisa@httools.com

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ANSI/ASME B5.50-1985 RETENTION KNOB

HT-0098	ANSI/ASME B5.50-1985 RETENTION KNOB
HT-0098	ANSI/ASME B5.50-1985 RETENTION KNOB
Order No.	D1	D2	M	L	L1	L2	H	H1
LDA-30	9.78	13.21	1/2"-13	27.94	11.68	8.13	2.54	1.01
LDA-40	12.45	18.80	5/8"-11	38.10	16.26	11.18	3.05	1.52
LDA-45	15.37	23.88	3/4"-10	45.72	20.83	14.73	4.06	2.03
LDA-50	20.83	28.96	1"-8	58.42	25.4	17.78	5.08	2.54

Purpose of Pull Studs

Lock and fasten tool holders on machine spindle by spindle drawbar grippers, preventing loosening during heavy cutting.
Assist taper positioning to ensure low runout and stable machining accuracy.
Bear cutting torque to avoid slipping between spindle and tool holder.
Serve as gripping point for ATC automatic tool change arms.
Multiple standards (BT/HSK/CAT/SK) compatible with various spindles and tool holders.
Uniform stress distribution reduces wear on spindle taper and tool holder threads.

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