Linear Shafting Features
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.
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 Helix Linear Technologies. Templates for machining are available on our website - www.nookindustries.com
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.
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
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.
The Nook Pillow Block mounting surface to center line dimension is held to ±0.001 inch. Bearings will self-align up to ±1/2°.
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