Sherline Boring Bar w/ Carbide Insert LH 55° & 80° 3/8
Description
- Sherline Boring Bar w/ Carbide Insert LH 55° & 80° 3/8
- Features replaceable carbide insert
- Offers 55° or 80° insert options
- Constructed from 1144 Stress-proof steel
- Designed for specialized machining tasks
- Optimized for exotic and abrasive materials
The Sherline Boring Bar w/ Carbide Insert LH 55° & 80° 3/8 is a precision tool designed for specialized machining tasks. It features a 3/8-inch diameter boring bar that securely holds a carbide insert with a Torx screw. This tool is available with either a 55° or 80° carbide insert, each offering distinct advantages for specific cutting applications. The 55° insert is suitable for creating sharper corners and fits into a 3/4-inch starting hole, while the 80° insert provides additional strength for roughing cuts and fits into a smaller 1/2-inch hole. The tool's holder is 3-1/4 inches long and can bore holes slightly over 2 inches deep when properly secured with two fastening screws. Constructed from 1144 Stress-proof steel and finished with black oxide, this boring bar is built for durability and reliability.
These left-hand boring bars are specifically designed for use with a new Sherline tool currently in development, intended to function as a turning tool from the backside with the bit positioned upside down. This design is not compatible with standard Sherline lathes without electronic modifications, as the spindle is not reversible.
Carbide insert tools, while more costly than high-speed steel tools, offer significant advantages in certain machining scenarios. They are particularly beneficial when working with exotic metals such as stainless steel or titanium, or abrasive materials like carbon fiber. Carbide inserts maintain their cutting edge longer and can expedite the cutting process, making them indispensable in modern professional machine shops. Additionally, if a cutting edge becomes dull or chipped, the insert can be rotated to expose new cutting surfaces, effectively doubling the tool's lifespan.
Note: These left-hand boring bars are not intended for use on standard Sherline lathes without electronic modifications to reverse the spindle.
- 1x Sherline Boring Bar w/ Carbide Insert LH 55° & 80° 3/8"
- 1x 55° LH Insert Boring Tool Holder
- 1x 80° LH Insert Boring Tool Holder
- 1x Torx screw
- 1x T7 Torx driver
- 3/8″ diameter boring bars
- Carbide insert secured with a Torx screw
- 55° LH boring tool fits into a 3/4″ starting hole
- 80° holder fits into a 1/2″ hole
- Made from 1144 stress-proof steel
- Black oxide finish
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Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Please review the Return Conditions, Return Exceptions and the process on How to Request a Return Authorisation (RA) before initiating a return request.
United Kingdom consumers exercising their statutory Right of Cancellation are subject to different conditions. See the Statutory Right of Cancellation.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
- A valid Return Authorisation (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
- The RA number is valid for 30 days. The returned item must be received within that period.
- The RA number must be included with the return.
- Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
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Return Exceptions
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- Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
- Consumables * — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tyres, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
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- Clearance Items * — Products identified as clearance or final sale, including end-of-life or discontinued items.
- Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
- On-Demand Items * — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfil a customer request.
- Professional & Specialized Equipment — See the Professional & Specialized Equipment Warranty page and Professional & Institutional Buyers (B2B) section in the Terms & Conditions.
* United-Kingdom consumers retain their statutory Right of Cancellation on these items. Its exercise is subject to the conditions and exclusions set out in the Statutory Right of Cancellation, and any reimbursement may be reduced to reflect a loss in value resulting from handling beyond inspection.
How to Request a Return Authorisation (RA)
While the same return policy applies, these orders require a separate contact process for returns.
- RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
- Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".