Features
- High‑grade tungsten carbide cutting teeth
- Integrated pilot bit with mandrel
- Ejector hole to assist core removal
- SDS‑Plus shank
- Compatible with SPEEDCORE SDS‑Plus pilot bits and extensions
- Intended for use with smaller rotary hammers
Specifications
| Material | Tungsten carbide |
| Shank Type | SDS‑Plus |
| Overall Length | 3 in |
| Cutting Depth | 3 in |
| Available Diameters (Inches) | ["1", "1 3/16", "1 3/8", "1 9/16", "1 7/8", "2 9/16", "2 11/16", "3 1/8", "3 3/16", "3 7/8", "4", "4 3/8"] |
| Available Sk Us (Model → Diameter) | [{"T3910SC" => "1"}, {"T3911SC" => "1 3/16"}, {"T3912SC" => "1 3/8"}, {"T3913SC" => "1 9/16"}, {"T3914SC" => "1 7/8"}, {"T3915SC" => "2 9/16"}, {"T3916SC" => "2 11/16"}, {"T3917SC" => "3 1/8"}, {"T3918SC" => "3 3/16"}, {"T3919SC" => "4"}, {"T3920SC" => "3 7/8"}, {"T3921SC" => "4 3/8"}] |
| Documentation | https://cx1.unilogcorp.com/cx1/view/api/asset/v1/dam/assets/ITEM/DOC/file/267/BOSCH_T3910SC_Catalog.pdf |
| Safety Notice | California Proposition 65 warning — https://www.p65warnings.ca.gov/ |
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Thin-wall core drill bit with an SDS‑Plus shank and tungsten carbide cutting teeth. The design includes an integrated pilot bit and an ejector hole to aid core removal. These bits are offered in multiple diameters and are intended for use with rotary hammers; they are compatible with SPEEDCORE SDS‑Plus pilot bits and extensions.
Model Number: T3910SC
Project Ideas
Business
On‑call micro‑coring service
Offer fast, small‑diameter coring (1–4 3/8 in) for electricians, low‑voltage installers, HVAC mini‑split line sets, security cameras, and plumbers. The SDS‑Plus thin‑wall bit set and pilot keep holes accurate in brick, block, and concrete; core from both sides to handle walls thicker than 3 in. Price per hole plus mobilization and dust control.
Retrofit landscape lighting and drainage
Specialize in coring existing pavers/retaining walls for recessed lights, deck post bases, and discreet drainage weep holes. Use 2 11/16–4 in bits for fixture seats and 1–1 3/16 in for conduit/drip lines. Package services with sealant and grommet installs for a clean, pro finish.
Mailbox, handrail, and post sleeves in masonry
Provide precise cores in stone or concrete caps for mailbox/posts, umbrella sleeves, and handrail anchors. Bits up to 4 3/8 in let you fit standard sleeves; the pilot bit centers on uneven caps. Sell as a turnkey service including epoxy anchoring and stainless trim rings.
Pre‑cored products for e‑commerce
Manufacture and sell ready‑to‑use cored CMU/paver luminaries, succulent planters, and wine‑rack blocks on Etsy or local markets. The ejector hole speeds production by clearing cores quickly. Offer custom diameters and patterns; upsell with LED inserts and felt feet.
Contractor hole‑kitting for precast parts
Partner with masons and landscapers to pre‑core wall caps, steps, and panels for balusters, conduit, and fasteners to spec. Use pilot bits and jigs for repeatability; label each part with hole size/location. Deliver just‑in‑time kits that reduce install time on site.
Creative
CMU luminary and planter blocks
Core clean cavities into concrete blocks or thick pavers using 2 11/16–4 3/8 in bits to create tea‑light luminaries, succulent planters, or incense holders. The integrated pilot bit keeps holes aligned on textured faces, and the ejector hole helps pop out the core plugs for repeatable patterns. Mix diameters for a graphic, honeycomb look along a garden path or patio wall.
Stone bubbling fountain
Turn a river rock or flagstone slab into a tabletop fountain by coring a 1–1 3/16 in through‑hole for pump tubing and a wider 2 9/16–3 1/8 in pocket on top for a water basin. With only 3 in cutting depth, core from both sides for thicker stones. The SDS‑Plus shank handles dense stone with smaller rotary hammers, and the pilot bit keeps exits clean with minimal blowout.
Masonry wine rack
Build a rustic wine rack by coring 3 1/8–3 3/16 in holes through split‑face blocks or cast concrete tiles to cradle standard bottles. Arrange blocks into a freestanding grid or wall‑mounted panel. The thin‑wall teeth leave smooth edges; use the ejector hole to remove plugs quickly and keep spacing consistent.
Herb wall from landscape caps
Create a vertical herb garden by coring 3–4 in cavities in concrete wall caps or large pavers to accept small nursery pots. Stagger hole sizes for drainage and aesthetics, and use the pilot bit to keep hole centers on a snapped chalk line for a tidy grid.
Cable‑pass concrete art panel
Cast or use pre‑made concrete tiles, then core 1–2 in pass‑throughs for hidden LED and speaker cables. Mount the panel as functional wall art with concealed wiring. The pilot bit helps hit precise chase locations; SPEEDCORE extensions let you reach deeper back boxes if needed.