PN: 1.5THR Category: .

Product Description

1.5THR Reference Target Mounts

For permanently mounted reference systems

Are you building or adding to a permanently mounted reference system? The 1.5THR is made exactly for that purpose – establishing permanent target points on jigs, fixtures, tools, and machinery. Use 1/4″ bolts through the two counterbored holes in the base to provide secure mounting. Then, two other 15/64th holes act as drill guides for placement of dowels. Once the 1.5THR is bolted down, use a 15/64ths drill through these guide holes into the substrate, ream to 1/4″, and insert dowels for a permanent fix on the target’s position.

A lid is included to keep out dust and dirt when not in use, held in place by two up-facing magnets on the top face of the nest. The lid overhangs the base slightly to aid in removal. 

1.5THR Reference Target Mount dimensions

May Be Used With

Any 1.5″ diameter SMR



Mounting holes:
0.266″ (6.76mm) diameter, counterbored to 0.438″ (11.13mm) dia., 0.250″ (6.35mm) deep, on 1.750″ (44.45mm) centers
Doweling holes:
0.235″ (5.97mm) dia. through, on 1.750″ (44.45mm) centers
Lid diameter: 2.5″ (63.5mm)
Material: Stainless steel (base and lid)
Hardness: HRC 42-45


PDF Download Drawing

Brunson 1.5THR drawing

PN: 1.5THR Category: .