Linear Shafting Features

SURFACE FINISH

Nook HG shafting is centerless ground to a consistently smooth surface finish of 14 micro inches rms or less. Excellent surface finish and hardness maximize the efficiency and life of linear bearings.

(See Image 1 in Figure 1 Below) for surface finish diagrams.

STRAIGHTNESS

Nook HG shafts are straight within 0.002 of an inch per foot cumulative when shipped from the factory. Handling or machining of shafting can cause the material to bend.

PRE-DRILLED & TAPPED HOLES

Nook HG alloy shafting is stocked with radial holes drilled and tapped to accept a continuous shaft support rail. Continuous support prevents shaft deflection when used to support heavy loads or for long travel lengths. Radial holes can be supplied in stainless steel shafts from 1/2" to 2" diameter.

(See Image 2 in Figure 1 Below) for pre-drilled & tapped holes.

PRECISION END MACHINING

Nook HG shafting can be supplied pre-machined to application requirements. Send a detailed sketch or blueprint for a prompt quotation. See page 200-201 for descriptions of machining offered by Nook Industries. Templates for machining are available on our website - www.nookindustries.com

LENGTH TOLERANCE

Nook HG shafting cut to your specified length will have a standard length tolerance of +1/32" up to 2" and ±1/16 above. Closer tolerances are available for an additional charge. Non-precision chamfered ends are standard on all cut shafting.

SHAFT SUPPORTS

Aluminum support components for end mounting or continuously supporting Nook HG shafting are available for inch sizes 1/2" to 2".

SELF-ALIGNING PILLOW BLOCKS

(See Image 3 in Figure 1 Below)

Nook Pillow Blocks simplify mounting of Nook Linear Bearings. They are available with EXCEL™ Bearings to fit shafts from 1/4 to 2 inch and 10 to 50mm. Nook Pillow Blocks provide the precision bearing bores necessary for linear bearing installation.

MOUNTING TOLERANCES

The Nook Pillow Block mounting surface to center line dimension is held to ±0.001 inch. Bearings will self-align up to ±1/2°.

MATERIALS

All Nook Pillow Blocks are manufactured from precision machined, thick walled, extruded aluminum.

PILLOW BLOCK SEALS

Nook Pillow Blocks are supplied complete with lip seals. The sealed pillow block keeps lubricant in and dirt and debris out resulting in smoother operation and longer bearing life.

Figure 1