Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
TECHNIKS CAT40 Retention Knob - CAT Retention Knobs
TECHNIKSCAT Retention Knobs

TECHNIKS CAT40 Retention Knob

The TECHNIKS Retention Knob is a CAT40 taper, 45° angle, 0.59 in diameter CAT retention knob (MPN 21003-45). It is manufactured to MAS standards. This component is designed for use in CAT40 tooling systems.

SKU 3G-OTH-265331

Also listed as: 2100345 · 21003 45

Brand
TECHNIKS
Item
CAT40 Retention Knob
Part Number
21003-45
Category
CAT Retention Knobs
Available to Order
Also known as:21003-45TECHNIKS
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

TECHNIKS
Manufacturer Part Number
21003-45

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

TECHNIKS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The TECHNIKS Retention Knob is a CAT40 taper, 45° angle, 0.59 in diameter CAT retention knob (MPN 21003-45). It is manufactured to MAS standards. This component is designed for use in CAT40 tooling systems.

Frequently Asked Questions

What is the TECHNIKS Retention Knob 21003-45 used for?

The TECHNIKS Retention Knob 21003-45 is used to secure CAT40 tool holders in the spindle of CNC milling machines. It ensures proper clamping and release during automatic tool changes, maintaining tool rigidity and machining accuracy in industrial metalworking operations.

What are the specifications of the TECHNIKS Retention Knob 21003-45?

The TECHNIKS Retention Knob 21003-45 has a CAT40 taper, a 45° angle, and a 0.59 in diameter. It is manufactured to MAS standards and carries the manufacturer part number 21003-45. This component is designed for use in CAT40 tooling systems.

Where to buy TECHNIKS Retention Knob 21003-45 worldwide?

You can source the TECHNIKS Retention Knob 21003-45 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring the component reaches your facility reliably.

How to select the correct retention knob for a CAT40 spindle?

To select the correct retention knob, match the taper size (CAT40), angle (45°), and diameter (0.59 in) to your spindle and tool holder specifications. Verify the knob meets MAS standards, as the TECHNIKS 21003-45 does, to ensure proper fit and safe operation.

Used in

Common applications for TECHNIKS
CNC milling — TECHNIKS BT40 end mill holders with coolant-through-spindle for high-speed machining of steel and aluminum.
High-pressure coolant machining — TECHNIKS sealed ER20 coolant collets for deep-hole drilling and chip evacuation in aerospace components.
Precision tool holding — TECHNIKS standard ER32 collets for holding drills and reamers in automated lathe operations.
Heavy-duty milling — TECHNIKS TG150 collets for clamping large-diameter tools in roughing operations on cast iron.
Coolant-through-spindle applications — TECHNIKS plug-style ER40 coolant collets for delivering coolant to the cutting edge in multi-axis machining centers.
Not sure this is the right part? Photo-identify it

TECHNIKS Products

3G Electric supplies TECHNIKS cat retention knobs. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from TECHNIKS

View all TECHNIKS parts

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first