GVM specializes in long, deep hole boring services. With our proprietary tooling and a wide range of manual and CNC work centers, we are capable of boring parts up to 70’ in length, 61” in diameter, with tolerances of .002” on diameter, and surface finishes to 8 Ra or better. Be sure to ask about our Trepanning and Large Honing capabilities up to 33”.
- Our facilities in Titusville & Pleasantville, PA have a wide range of manual and CNC work centers to fit your needs and capacity for most lead times needed.
Grand Valley has developed proficiency in several different techniques that facilitate the machining of your parts:
- Line Boring involves rotating the cutting tool (which is located on a bar between bearings) while the piece remains stationary. It allows work on bores that do not lend themselves to rotation and permits bore work which does not require 100% cleanup.
- Push Boring is the most common form of stock removal from inside diameters and is typically used to produce a straight bore in line with the O.D. Grand Valley has developed proprietary tooling which allows us to remove large amounts of material in a single pass, or to bore up to 40 feet in one direction.
- Pull Boring is a technique which pilots off the rough bore and will follow the existing hole. It can be used in smaller diameters to remove material quickly while maintaining a good surface finish.
Bored Ingot and Electrode molds produce higher yields than “as cast” molds. They are easier to strip and require little or no surface preparation
Deep Hole Drilling and Boring
Deep hole drilling creates bores with a depth-to-diameter ratio greater than 10:1, making it essential for industries like aerospace, power generation, oil and gas, defense, and steel production. It provides accurate, straight holes through long or heavy parts, whether the requirement is for a through-hole, a blind-hole, or trepanning for larger diameters.
Deep hole boring typically follows drilling to enlarge and refine an existing hole. This step is critical for achieving tighter tolerances and smoother finishes, ensuring that components perform reliably under demanding conditions. Together, drilling and boring provide the precision and consistency required for complex industrial applications.
Industries Served
Grand Valley Manufacturing provides deep hole drilling and boring services to a wide range of industries that depend on accuracy, reliability, and the ability to handle large, complex parts. Sectors we support include:
- Aerospace
- Defense & Military
- Power Generation
- Oil & Gas
- Steel & Paper Mills
- Mining & Heavy Equipment
- Nuclear
- Transportation
Why Choose GVM?
With decades of experience supporting industries that demand accuracy on large, heavy parts. With cranes up to 130 tons and advanced machining systems, we are equipped to manage oversized components while maintaining precision.
Clients rely on us for quality, dependable turnaround, and technical expertise across aerospace, defense, nuclear, oil and gas, mining, transportation, and power generation projects.
For reliable deep hole boring and deep hole drilling services, contact us today. Request a quote or connect with our technical team to discuss your specifications and project needs.
If it looks like it doesn’t fit, call to speak with one of our technical experts.
Facility Capabilities at a Glance
| Small Shaft Buildings 51 & 52 | Medium Shaft Plant | |
|---|---|---|
| Outside Diameter | 2.00″ – 24.00″ OD | 4″.00 – 48.00″ OD |
| Inside Diameter | 1.180″ – 6.00″ ID | 2.25″ – 40.00″ ID |
| Length | 25′ (300″ ) | 50′ (600″) |
| Weight | 10 Ton Crane | 20 Ton Crane |
| Large Shaft Buildings 82 & 87 | Large Milling Plant | |
|---|---|---|
| Outside Diameter | 4.00″ – 98.00″ OD | 2.00″ – 20′ (240″) Width |
| Inside Diameter | 2.00″ – 60.00″ ID | up to 7′ (84″) Height |
| Length | 70′ (840″) | up to 20′ (240″) Length |
| Weight | 130 Ton Crane | 20 Ton Crane |