Premium CNC & Router Bits for Precision Cutting

3/8″ Up-Cut Spiral Flush Trim Router Bit – 3/8″ Shank

Our newest addition to our spiral flush trim router bits, this 3/8″ upcut flush trim router bit is the balance between tight radius inside corners and the strength of 1/2″ bits. AstraHP Coated Solid Carbide 3/8″ Cutting Diameter 1-1/2″ Length of Cut 3/8″ Shank (Requires 3/8″ collet or reducer) 4″ Overall Length Recommended RPM: 16,000-18,000 Made in USA #row-1765555992 > .col > .col-inner { padding: 20px 0px 20px 0px; } #section_68872178 { padding-top: 45px; padding-bottom: 45px; } @media (min-width:550px) { #section_68872178 { padding-top: 65px; padding-bottom: 65px; } } @media (min-width:850px) { #section_68872178 { padding-top: 2px; padding-bottom: 2px; } }

3/8″ Up-Cut Spiral Flush Trim Router Bit – 3/8″ Shank - Main image
*AstraHP Coated* Bits&Bits 340-SRF375FT – 3/8 up-cut flush trim router bit*AstraHP Coated* Bits&Bits 340-SRF375FT – 3/8 up-cut flush trim router bit
$52.79 $79.99 In stock

Category: Flush Trim Router Bits

This 3/8-inch up-cut spiral flush trim router bit is designed for clean, efficient trimming and flush cutting tasks. It features a 3/8-inch shank for compatibility with a range of routers, and the up-cut spiral geometry helps pull chips upward for smoother cuts and reduced heat buildup. The bit is coated with AstraHP, a treatment that may enhance durability and performance during use.

  • Up-cut spiral design for efficient chip evacuation and cleaner cuts
  • 3/8-inch shank size for secure fitment in compatible routers
  • AstraHP coating for potential added wear resistance
  • Suitable for flush trimming applications
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)

Matthew ★★★★★

The up-cut spiral design on this bit left a much cleaner edge on my laminated countertops than straight bits I've used before. The 3/8-inch shank fit snug in my router collet, with zero vibration even during heavy passes.

Steven W. ★★★★★

Had to trim three different hardwood panels in one pass and the spiral up-cut left edges so smooth I didn't even need sandpaper on the first two. The 3/8-inch shank held steady in my router the whole time, no wobble or burning smell.

George ★★★★★

I used this bit to flush-trim some hardwood plywood edges, and the up-cut spiral design really pulled the dust up and away from the work surface. The 3/8-inch shank fit my router collet perfectly with zero vibration, giving a smooth, chatter-free cut.

Related Products