Allied Machine #2 T-A 1.25" Indexable Spot Chamfer Drill New Inserts 1" SHK For Sale

Item #715

Spade Drill:

191216-17

#2 Series T-A Form Insert

Super Cobalt AM200

Drill:

190424-21

25mm Flanged Step

#2.5 Special

Step flange insert:

Sandvik SPMT09T308-WL 235

This complete tooling description highlights a high-efficiency combination indexable spot-drilling and chamfering package utilizing an Allied Machine & Engineering specialized tool body and premium Sandvik Coromant inserts.📐 Technical Blueprint & Component Specifications1. The Holder: Allied Machine #2 T-A (Part #190424-21)

• Tool Function: A specialized 1.25" indexable spot and chamfer drill body.
• Shank Profile: Built with a rigid 1" Straight Shank (SHK) featuring a standard clamping flat.
• Application: Unlike traditional straight-plunge deep drilling, the #2 T-A chamfer series is optimized for high-rigidity spot-drilling, hole countersinking, and edge chamfering in a single operation.

2. The Pilot/Spot Inserts: Allied Machine (Part #191216-17)

• Insert Role: This part number designates the primary replaceable spot-drill inserts for the #2 series head.
• Geometry: Designed with a 90° or 118° precision tip layout (typically 90° for spot/chamfer combinations) to establish localized concentricity and clear a clean, flat entry bevel before long-body drilling lines follow.

3. The Chamfering/Milling Inserts: Sandvik Coromant (SPMT 09 T3 08-WL 235)

• Insert Form: A Sandvik Square (S) Milling Insert featuring an 11° positive clearance angle.
• Dimensions: Built with a 3/8" inscribed circle (IC) and a 0.0315" (0.8mm) corner radius.
• WL Geometry: The "WL" designation provides a highly efficient light-cutting wiper geometry tailored for pristine surface finishes during countersinking and multi-sided beveling.
• Grade 235 (CVD TiCN+TiN): A reliable multi-coated caroffere grade engineered specifically for general steel and tough stainless steel milling applications where heat generation is high.

⚙️ Operating Mechanics & Best PracticesWhen running an integrated spot-and-chamfer toolhead using separate caroffere sub-elements, tool alignment is paramount:

1. Z-Depth Calibration: Calculate your final programmable depth precisely to ensure the Sandvik square inserts engage the top edge of the hole at exactly a 45-degree angle without exceeding the insert's 0.3425" maximum depth of cut (APMX).
2. Rigid Clamping: Because spot drilling creates high axial forces and the outer Sandvik inserts create heavy radial load during the chamfer cycle, clamp the 1" straight shank inside a high-precision side-lock holder or milling chuck. Avoid standard collets if heavy chatter is encountered.
3. Coolant Management: Utilize maximum through-spindle coolant or targeted exterior nozzles to instantly clear chips from the pocket, preventing nested chips from fracturing the Sandvik or Allied insert faces.

The total estimated market value for this entire high-efficiency spot and chamfering package is between $485 and $660.The pricing breaks down into individual components based on standard commercial supplier listings and industrial surplus markets:💰 Component Price Breakdown

• Allied Machine #2 T-A 1.25" Indexable Spot Chamfer Drill Body (190424-21): Brand new, this specialized 1" straight-shank multi-operation holder typically retails between $350 and $450 through primary industrial distribution networks.
• Allied Machine New 191216-17 Replaceable Spot-Drill Inserts: These custom pilot-spot inserts generally range from $95 to $140 per insert, though they are frequently packaged and sold in pairs by distributors.
• Sandvik Coromant SPMT09T308-WL 235 Caroffere Inserts (2 Units): Brand new from Sandvik Coromant, individual inserts carry a list price of roughly $20 to $35 each (approx. $40 to $70 total for the pair). On secondary markets like , a pair can occasionally be sourced from broken boxes for about $15 to $25.