You may also like
Greenlee 50122380 Self-Feeding Spade Bit Kit, 6-Piece Set
Model: GRN-50122380
Greenlee 50122380 Self-Feeding Spade Bit Kit, 6-Piece SetThe Greenlee 50122380 Self-Feeding Spade Bit Kit is a 6-piece assortment of self-feeding spade bits built for electricians and installers who...
Greenlee
$116.94
$52.53
Greenlee 1" Self-Feeding Spade Bit with Quick Change Hex Shank Professional Drilling System
Professional self-feeding design for efficient drilling and wire pulling applications
The Greenlee 1" Self-Feeding Spade Bit delivers professional performance with its innovative self-feeding design that requires less effort and reduces vibration during operation. Forged and heat treated for long life, this professional-grade bit features a unique tapered design for existing hole enlargement and includes a convenient hole in the top center for wire pulling applications. The 1/4" quick change hex shank provides secure connection with power drills 1/4" or larger, making it ideal for boring hardwood, softwood, plywood and drywall with professional reliability.
Professional Features & Benefits
- 1" Bit Diameter: Provides precise hole sizing for professional electrical and construction applications requiring exact dimensional accuracy.
- Self-Feeding Design: Innovative engineering reduces drilling effort and minimizes vibration for improved operator comfort and control during extended use.
- Forged and Heat Treated Construction: Professional-grade manufacturing process ensures exceptional durability and extended service life in demanding applications.
- Wire Pulling Hole: Integrated hole in top center enables efficient wire pulling operations, combining drilling and wire installation in one step.
- Quick Change Hex Shank: 1/4" hexagonal shank design provides secure, wobble-free connection and rapid bit changes for improved productivity.
- Tapered Design: Unique geometry allows for existing hole enlargement applications, providing versatility for modification and repair work.
- Multi-Material Capability: Engineered to bore hardwood, softwood, plywood and drywall with consistent performance across diverse materials.
Technical Specifications
- Bit Diameter: 1.000 IN (25.400 MM)
- Overall Length: 6-1/4 IN (158.800 MM)
- Product Type: Self Feeding
- Product Weight: 0.120 LB (54.400 GM)
- Shank Size: 1/4 IN (6.400 MM)
- Shank Type: Hexagonal
Installation & Operation
- Mount the bit in a suitable power drill with 1/4" or larger chuck capacity, ensuring secure connection of the hex shank.
- Connect the drill to appropriate power source and verify proper bit engagement before beginning operation.
- Position the bit at the desired drilling location with appropriate clearance and access for safe operation.
- Configure drill speed settings as supported by the material specifications and drilling requirements.
- Test drilling functionality on sample material and verify proper self-feeding performance before full application.
- Complete drilling operations following safety practices appropriate to the material and application requirements.
Professional Applications
- Electrical Installation and Wiring Projects
- Construction and Remodeling Work
- Professional Carpentry and Millwork
- Maintenance and Repair Operations
- Commercial Building Services
- Residential Construction Projects
- Industrial Facility Modifications
Why Choose Greenlee Quality?
Greenlee delivers professional-grade reliability through forged and heat treated construction that ensures long service life in demanding applications. The innovative self-feeding design and quick change hex shank demonstrate Greenlee's commitment to professional efficiency and operator comfort, providing the durability and performance that professionals depend on for consistent results.
Manufacturer Resources
Spec Sheet
Product Specs
- Bit Diameter:
- 1.000 IN (25.400 MM)
- Overall Length:
- 6-1/4 IN (158.800 MM)
- Product Type:
- Self Feeding
- Product Weight:
- 0.120 LB (54.400 GM)
- Shank Size:
- 1/4 IN (6.400 MM)
- Shank Type:
- Hexagonal
- Department:
- Electrical
- Product Subgroup:
- Drill & Driver Bits
- Product Group:
- Power Tools & Accessories
Greenlee 34A-1 – Frequently Asked Questions
1) Will the Greenlee 34A-1 spade bit fit an impact driver with a 1/4 inch hex chuck?
Yes. The 34A-1 has a 1/4 inch hexagonal shank, so it drops into any 1/4 inch quick change hex holder or chuck. Greenlee also notes it works in power drills with a 1/4 inch or larger chuck, so a standard keyless drill chuck grips it fine too.
2) How deep can I bore with the Greenlee 1 inch self-feeding spade bit, and will it clear a 2x4 stud?
Overall length is 6-1/4 inches, which includes the shank. That is enough to pass straight through a nominal 2x4 stud (3-1/2 inches of actual wood) with room for the chuck to clear. For drilling through doubled plates or deeper assemblies you need a bit extension, which is not included.
3) What size hole does the Greenlee 34A-1 drill, and is it big enough for NM cable runs?
It cuts a 1 inch (25.4 mm) hole. That is the common bore size electricians use for running multiple runs of NM cable or a length of flexible conduit through framing, and it drills hardwood, softwood, plywood and drywall.
4) Can a 1 inch spade bit be used to enlarge a hole I already drilled?
Yes, that is one of the reasons to pick the 34A-1 over a plain flat bit. It uses a tapered geometry specifically for enlarging existing holes, so the point does not wander when there is no fresh material under the center spur.
5) What is the hole in the end of the Greenlee 34A-1 spade bit for?
It is a wire pulling hole, drilled through the top center of the blade. After boring a stud or joist you can hook your pull wire or fish line through it and draw the wire back as you retract the bit, so the bore and the pull happen in one pass. Useful on rough-in work where access is tight.
6) Should I use a self-feeding spade bit or an auger bit for drilling through studs?
A self-feeding spade bit like the 34A-1 pulls itself into the wood with less push from the operator and less vibration than a standard flat bit, and it is far cheaper and lighter (0.12 lb) to carry a set of than augers. An auger is still the better choice for long, deep, chip-clearing bores through stacked framing or when you need to drill a long angled run. For routine rough-in holes through single studs and plates, the spade bit is faster to change and easier on the drill.
7) Is the Greenlee 34A-1 safe to use on metal studs or nail plates?
No. The 34A-1 is rated for hardwood, softwood, plywood and drywall only. It is forged and heat treated for wood boring, not for steel framing or nail protection plates. For metal studs use a bi-metal hole saw or a step drill instead.
8) Does the Greenlee 34A-1 come as a single bit or part of a set?
It is sold as the single 1 inch bit, model 34A-1. If you need other diameters for the same quick change holder, order them individually; each takes the same 1/4 inch hex shank interface.
How fast can I get the Greenlee 34A-1 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Greenlee 34A-1 come with a warranty?
Absolutely. The Greenlee 34A-1 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Greenlee 34A-1?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Greenlee 34A-1 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.