Products for bench top machinists | LittleMachineShop.com

Collets, ER-20 Individual Sizes

Collets, ER-20 Individual Sizes - Main image
Collets, ER-20 Individual Sizes - View 2Collets, ER-20 Individual Sizes - View 3Collets, ER-20 Individual Sizes - View 4Collets, ER-20 Individual Sizes - View 5Collets, ER-20 Individual Sizes - View 6
$8.23 $13.49 In stock

ER-20 collets have a major diameter of 0.83" (21 mm) and a length of 1.24" (31.5 mm). They have a clamping range of 1/16" to 1/2" (1.0 mm to 13.0 mm).

ER collets are made from high grade tool steel, hardened and ground to close tolerance. Kerf cuts allow the collet to expand and contract as needed within the specific clamping range to securely hold the tool or workpiece.
*Collet must be assembled into a collet chuck nut before inserting into the collet chuck.

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.8 / 5 · 5 reviews)

Emily ★★★★★

The clamping range from 1/16" up to 1/2" covers everything I need in the shop, and the tool steel feels solid when I torque them down. Each collet sits snug in the holder without any wobble during a heavy cut.

Joshua ★★★★★

The 21mm diameter fits my ER-20 spindle perfectly, and the tool steel holds tight even during heavy cuts. I bought a few to cover my most-used bit sizes, and the clamping range is exactly as described.

Stella ★★★★★

I’ve been swapping out collets for different jobs, and these ER-20s hold my end mills securely without any runout. The 1/16" to 1/2" clamping range covers everything I usually need, and the tool steel feels solid during high-speed cuts.