Drill chuck holds bits from 5/32″ down to as small as #80 (.0135″)
Threads directly onto the 3/4-16 spindle nose in seconds, just like an end mill holder
Spring-loaded brass shaft automatically returns the chuck to the "up" position
Ball-bearing knurled feed ring lets you feel the cut for finer control
Reduces broken bits when drilling holes smaller than 1/16″ in diameter
Compact brass and steel construction sized for Sherline lathe and mill spindles
The Sherline Sensitive Drilling Attachment is designed to make drilling small holes quicker, easier, and far less frustrating. Using a quill or handwheel feed on drills smaller than 1/16″ often leads to broken bits, since the extra leverage makes it hard to feel how the drill is cutting. This attachment solves that by letting you feed the drill by hand while a spring-loaded shaft controls the pressure, so you can "sense" the cut in real time.
The unit consists of a 5/32″ drill chuck that slides on a central shaft, with a spring inside a brass spacer tube supporting the chuck and returning it to the up position after each pass. Installation takes seconds: simply insert the spring tube into the spindle and thread the attachment body onto the 3/4-16 spindle thread. To use, grasp the red knurled ring (which rides on a ball bearing) and pull the drill down against spring tension, letting it return when finished. Note: your spindle's thru-hole must measure at least .408″ for proper fit — Sherline recommends checking this before ordering.
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.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at RoboItchi'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 Authorization (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.
Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RoboItchi's troubleshooting process or of a verified shipping error by RoboItchi.
Refunds are processed within 7 days after receipt and inspection of the returned item.
A ¥10,000 cleaning fee may apply to domestic robots returned in used or unclean condition.
A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RoboItchi's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
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, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
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 RoboItchi and ordered specifically to fulfill a customer request.
To request a return, submit a support ticket from your account under My Support Tickets to obtain a Return Authorization (RA) number. Returns without an RA number will be refused.
