Key Slot Standards
For a key to function, the shaft and rotating machine element must have a keyway and a keyseat, which is a slot and pocket in which the key fits. The whole system is called a keyed joint. A keyed joint may allow relative axial movement between the parts. Commonly keyed components include gears, pulleys, couplings, and washer.
. The slots for the incoming mail must be at minimum of 1.75 inches high by 10 inches wide. Slots on locking mailboxes must be able to hold the residents daily volume of mail. The slots must be large enough to accommodate any unfolded USPS Priority Envelopes. Holes and Slots Standard Holes. Standard hole sizes for bolts are made 1/16-in. Larger in diameter than the nominal size of the fastener body. This provides a certain amount of play in the holes, which compensates for small misalignment’s in hole location or assembly, and aids in the shop and field entry of fasteners. WOODRUFF KEY SLOTS AND KEYWAYS J503195905 Revision History Related Info. TUBING, FLARED, STANDARD DIMENSIONS FOR, DESIGN STANDARD. These have a cross slot about 5/32” wide. 1913 (MIL-STD-1913 “Picatinny”) AND 1913 The 1913 key is wider than the standard key because the slots are nominally.206” wide. (A little more than 3/16”) The standard key will work with a Picatinny rail but the light will move back and forth with recoil unless the clamp is very tight.
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Standards for T-slots
T-slots come in standard sizes. Needless to say things designed to fit in the T-slots are designed to fit these standard sizes. Similarly, the cutters designed for cutting T-slot are designed to cut standard size T-slots.
fig outline of a T-slot
Key Slot Standards Games
The key characteristic of a T-slot is its width. Of course this can be metric or imperial
Metric T-slots (all in millimeters)
A b B+ C C+ Hmin Hmax
6 11 +1.5 5 +1 13 11
8 14.5 +1.5 7 +1 18 15
10 16 +2 7 +1 21 17
12 19 +2 8 +1 25 20
Imperial T-slots (All in inches)
Key Slot Standards App
diam of bolt width of slot depth of throatmax
A
1/4 9/32 3/8 1/8 9/16 1/2 15/64 13/64
5/16 11/32 7/16 5/32 21/32 19/32
3/8 7/16
1/2 9/16
5/8 11/16