Glebar DD-7

Specs verified 2026-10-05 · glebar.com Updated 2026-10-05

Key Specifications

grinding diameter capacity

Min 0.031 in (0.8 mm) – Max 0.500 in (13 mm)

work wheel diameter

Two 7 in (178 mm) wheels or two 10 in (254 mm) wheels

grinding diameter stock

Min 0.031 in (0.8 mm) – Max 0.500 in (13 mm) (application dependent)

work wheel power

2 x 3 hp (2.2 kW)

work wheel speed

3,450 rpm

work wheel width

1 in (25 mm)

How much does the Glebar DD-7 cost?

Price estimate

Uncertain

We do not have a price for the Glebar DD-7 that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.

Overview

The Glebar DD-7 is a double disc grinder for small parts: it grinds both ends of a component at once between two opposed wheels to control length and perpendicularity. Stock diameter runs from 0.031 in (0.8 mm) to 0.500 in (13 mm), depending on the application, and stock length is listed as 5 in (12.7 cm). Typical work is carbide drill blanks for printed circuit boards, carbide pins, ceramic blocks, alumina tubes and roller bearings.

Each wheel has its own 3 hp (2.2 kW) motor and turns at 3,450 rpm. The wheels are 1 in (25 mm) wide, and the machine is built with either two 7 in (178 mm) wheels or two 10 in (254 mm) wheels. Brushless servo motors move the slides under closed-loop control. A brake dresser with a diamond roll is available.

How parts are presented is the main decision. The DD-7 can be set up in three fixturing modes: vertical with a carriage, thrufeed, or a precision fixture, chosen by part shape and by how much automation is wanted. For carbide drill blanks Glebar quotes 5,000 per hour. Gauging and conveyors can be integrated, and the interface software can be extended to control bowl feeders and robots.

Glebar says no double disc grinder has a smaller footprint. The numbers are 89 x 53 x 78 in (226 x 135 x 198 cm) and 5,500 lb (2,495 kg), on a 6 in (152 mm) thick granite bed. It needs 480 VAC, 60 Hz at 35 A and 4 CFM of air at 80 PSI.

Full Specifications

Parameter	Value
Grinding Diameter Capacity	Min 0.031 in (0.8 mm) – Max 0.500 in (13 mm)
Work Wheel Diameter	Two 7 in (178 mm) wheels or two 10 in (254 mm) wheels
Grinding Diameter Stock	Min 0.031 in (0.8 mm) – Max 0.500 in (13 mm) (application dependent)
Work Wheel Power	2 x 3 hp (2.2 kW)
Work Wheel Speed	3,450 rpm
Work Wheel Width	1 in (25 mm)
Machine Weight	5,500 lb (2,495 kg)
Grinding Length Stock	5 in (12.7 cm)
Machine Dimensions	89 x 53 x 78 in (226 x 135 x 198 cm)
Power Requirement	480 VAC, 60 Hz, 35 A
Air Requirement	4 CFM at 80 PSI
Machine Bed	6 in (152 mm) thick granite

Specifications sourced from glebar.com — verified 2026-10-05

Strengths & Limitations

Strengths

Grinds both ends at once, controlling length and perpendicularity on parts from 0.031 in (0.8 mm) to 0.500 in (13 mm) in diameter
Three fixturing modes: Vertical (Carriage), Thrufeed, or Precision Fixture
Glebar quotes 5,000 carbide drill blanks per hour
Brushless servo motors on the slides with closed-loop drive
6 in (152 mm) thick granite bed under a 5,500 lb (2,495 kg) machine
Choice of two 7 in (178 mm) wheels or two 10 in (254 mm) wheels

Limitations

Stock diameter tops out at 0.500 in (13 mm), and Glebar notes the range is application dependent
Stock length is listed as 5 in (12.7 cm)
Each wheel motor is 3 hp (2.2 kW), which suits small end faces, not heavy stock removal
The brake dresser with diamond roll is an available item
Glebar's table gives no length or parallelism tolerance, so capability has to be proven on sample parts

Best For

Carbide drill blanks for printed circuit board drills Carbide pins and small roller bearing elements Alumina tubes and ceramic blocks ground to length High-volume thrufeed end grinding with conveyors and gauging Small parts up to 0.500 in (13 mm) in diameter

Frequently Asked Questions

01 What does the Glebar DD-7 double disc grinder do?

It grinds the two ends of a small component at the same time between a pair of wheels, which controls the part's length and the perpendicularity of its ends. Glebar lists printed circuit board drill blanks, carbide pins, ceramic blocks, alumina tubes and roller bearings as common applications.

02 What part sizes fit the DD-7?

Stock diameter from 0.031 in (0.8 mm) to 0.500 in (13 mm), which Glebar marks as application dependent, and a stock length of 5 in (12.7 cm). The grinding wheels are 1 in (25 mm) wide.

03 What are the three fixturing modes of the DD-7?

Vertical (Carriage), Thrufeed, and Precision Fixture. Glebar says the choice depends on the shape of the part and the degree of automation required. Thrufeed suits continuous high-volume work, while a precision fixture locates parts individually.

04 How fast is the DD-7?

Glebar states that the design can grind 5,000 carbide drill blanks per hour. Each of the two wheels is driven by a 3 hp (2.2 kW) motor at 3,450 rpm, and the slides are moved by brushless servo motors.

05 How much space and power does the DD-7 need?

The footprint is 89 x 53 x 78 in (226 x 135 x 198 cm) and the weight 5,500 lb (2,495 kg). Electrical supply is 480 VAC, 60 Hz at 35 A, and air consumption is 4 CFM at 80 PSI.