Compass Point-Holding Clamps for Beams
Clamp these point-holding clamps, also known as trammels, onto a beam to create a compass.
| For Beam Thick. | Marker Type | Includes | Each | |
Painted Steel | ||||
|---|---|---|---|---|
| 5/8"-1 1/2" | Pen, Pencil, Scribing Point, Soapstone Crayon | Two 6" long steel points | 0000000 | 000000 |
Compass Point-Holding Clamps for Rulers
Turn your ruler into a compass by adding these point-holding clamps. They're also known as trammels.
| For Ruler Thick. | Marker Type | Includes | Each | |
Aluminum | ||||
|---|---|---|---|---|
| 1"-1 1/4" | Lead | One Lead Point, One Rotating Blade | 00000000 | 000000 |
Compass Point-Holding Clamps for Pipes
Combine these point-holding clamps with a pipe to create a compass that marks circles 1 1/2" diameter and larger. They're also known as trammels.
| Min. Circle Dia. | For Pipe Size | For Min. Pipe Lg. | Marker Type | Includes | Each | |
Aluminum | ||||||
|---|---|---|---|---|---|---|
| 1 1/2" | 1/2 | 3 1/2" | Scribing Point, Soapstone Crayon | Hex Key, One Moveable Head with Marking Tool Holder, One Stationary Head with Hardened-Steel Center Point, Soapstone Crayon, Steel Scribe | 0000000 | 000000 |
Starrett Expandable Beam Compasses
Transfer measurements and draw large, precise circles. These compasses have expandable point-holding clamps, also known as trammels, that securely grip the flat top of the beam. Adjust the scribing points with the knurled grip on the clamps. One clamp has a screw for making fine adjustments to ensure accuracy when marking and measuring.
| Max. Circle Dia. | Marker Type | Adjustment Method | Beam Lg. | Includes | Manufacturer Model No. | Each | |
Chrome-Plated Steel | |||||||
|---|---|---|---|---|---|---|---|
| 18" | Scribing Point | Screw | 10 1/2" | Beam with Flattened Top, Caliper Legs | C251A | 0000000 | 0000000 |
| 26" | Scribing Point | Screw | 14 1/2" | Beam with Flattened Top, Caliper Legs | C251B | 0000000 | 000000 |
| 36" | Scribing Point | Screw | 20" | Beam with Flattened Top, Caliper Legs | C251C | 0000000 | 000000 |
Expandable Beam Compasses
Draw circles up to 48" or add Extension Beams to create even larger circles. A Beam Coupling is required for each extension beam.
| Max. Circle Dia. | Marker Type | Beam Lg. | Includes | Container | Container Material | Each | |
Aluminum | |||||||
|---|---|---|---|---|---|---|---|
| 48" | Scribing Point, Pen, Lead | 13" | Two 13" Long Beams, One Beam Coupling, Scribing Points, Ruling Pen, Lead Tips | Case | Plastic | 00000000 | 000000 |