Lead Screws / Multi-Pitch / Both Ends Stepped DIN103

Dimensional Drawing

Right-Hand Screw / Left-Hand Screw / Fine Pitch Right-Hand Screw

Right-Hand Screw with Keyway

h7 Tolerance (V,Q) Over or Less Tolerance 3 6 0 －0.012 6 10 0 －0.015 10 18 0 －0.018 18 30 0 －0.021 30 50 0 －0.025 Compliant with JIS B 0401

Unspecified Dimensional Tolerances Over or Less Tolerance 0.5 3 ±0.1 3 6 ±0.1 6 30 ±0.2 30 120 ±0.3 120 400 ±0.5 400 1000 ±0.8 1000 2000 ±1.2 Compliant with JIS B 0405 Class m (Middle Class)

[ ! ] Keyway machining details conform to "Shaft Keyway" Dimensions shown on the keyway table. Type [M] Material [S] Surface Treatment Right-Hand Screw Right-Hand Screw with Keyway Fine Pitch Right-Hand Screw Left-Hand Screw MTSRW MTSRV MTXRW MTSLW EN 1.1191 Equiv. — MTSBRW MTSBRV MTXBRW MTSBLW Black Oxide RMTSRW RMTSRV — RMTSLW Low Temperature Black Chrome Plating MTSTRW — — MTSTLW EN 1.4305 Equiv. — ·No hardening treatment is applied.

Lead Screw Accuracy Item Content Standard Chevron Tr Standard (Old TM Standard) Tolerance and Allowable Dimension JIS B 0217-1,2 Screw Accuracy (Threaded) 7e Nut Accuracy (Tapped) 7H Single Pitch Error ±0.02 Accumulated Pitch Error ±0.15/300 mm The Tr standard has the same standard dimensions as the old JIS TM standard (abolished). Dimensional tolerances are regulated for Tr standard. Refer to the table below for Lead Screw Specifications.

Standard Chevron Dimensions H = 1.866P, H1 = 0.5P, d2 = d - 0.5P d1 = d-P, D = d, D2 = d2, D1 = d1 Thread d: O.D. d1: Root Dia. d2: Effective Dia. Tapped D: Root Dia. D1: I.D. D2: Effective Dia. P: Pitch H1: Engage Height

Specification Table

● Runout Measurement Method

Alterations

Alterations	Flat Machining	Retaining Ring Groove	Wrench Flats	Coarse Tapping	Threaded	Square Chamfering	Keyway
					For Bearing Nut
Code	FV (V Part), FQ (Q Part)	AC (V Part), AQ (Q Part)	SC (V Part), SQ (Q Part)	MC (V Part), MQ (Q Part)	BV (V Part), BC (Q Part)	ZC (V Part), ZQ (Q Part)	KV (V Part), KC (Q Part)
Spec.	FV,FQ,FW,FY = 0.5 mm Increments FV = Applied on V part FQ = Applied on Q part [ ! ] Applicable to either V or Q Ordering Code FV5−FW10−FY1 [ ! ] FV (FQ) = 0, or FV (FQ) ≥ 2 [ ! ] When V (Q) ≤ 25 FY ≤ 1.0 [ ! ] When V (Q) ≥ 26 FY ≤ 2.0 [ ! ]3 ≤ FW ≤ 20	AC, AQ = 0.1 mm Increments AC, AQ ≤ F (S) - m - n For the m, n value, see the table below (For the m value, consider the tolerance.) Ordering Code AC13.3 Applied on AC = V part and AQ = Q part V·Q e Tolerance m + 0.14 0 n Machining Limit 6 4 +0.075 0 0.7 n ≥ 1.2 7 8 5 9 6 0.9 10 9.6 0 −0.09 1.15 n ≥ 1.5 12 11.5 0 −0.11 14 13.4 15 14.3 16 15.2 17 16.2 20 19 0 −0.21 1.35 25 23.9 30 28.6 1.65 35 33 40 38 0 −0.25 1.9 N ≥ 2 [!] Retaining ring is not included.	SC,SQ,SW,SY = 1 mm Increments Applied on SC = V part Applied on SQ = Q part [ ! ] Applicable to either V or Q Ordering Code SC5−SW10−SY8 [ ! ] SC(SQ) = 0, or SC (SQ) ≥ 2 [ ! ] When Q (V) < 15 SW ≥ Q (V) −2 [ ! ] When 15 ≤ Q (V) ≤ 25 SW ≥ Q (V) −3 [ ! ] When 30 ≤ Q (V) SW ≥ Q (V) −5 [ ! ]3 ≤ SY ≤ 20	MC = Applied on V part MQ = Applied on Q part Ordering Code MC24 V·Q MC·MQ (Selection Range) 6 3 7·8 3·4 9·10 3·4·5 12 3·4·5·6 14·15 3·4·5·6·8 16·17 3·4·5·6·8·10 20 3·4·5·6·8·10·12 25·30 3·4·5·6·8·10·12·16 35 3·4·5·6·8·10·12·16·20 40 3·4·5·6·8·10·12·16·20·24 [ ! ] When combining with an other alteration, do not specify this alteration in such a way that the shaft end thickness becomes less than 1 mm	[ ! ]BV,BC ≤ M × 3 [ ! ] BV, BC ≥ Pitch × 3 [ ! ] BV, BC ≤ F,S - Pitch × 3 Ordering Code BC20 BV = Applied on V part BC = Applied on Q part V·Q M × Pitch (Fine) 6 M6 × 0.75 8 M8 × 1.0 10 M10 × 1.0 12 M12 × 1.0 14 M14 × 1.0 15 M15 × 1.0 17 M17 × 1.0 20 M20 × 1.0 25 M25 × 1.5 30 M30 × 1.5 35 M35 × 1.5 40 M40 × 1.5 [ NG ]V,Q = 7·9·16 Not applicable   Thread Tolerance Zone Class: 6 g	W, A = 1 mm Increments ZC = Applied on V part ZQ = Applied on Q part ZE = Applied on E part [ ! ] Applicable to either V or Q Ordering Code ZC10−W8−A8 [ ! ] Can be combined with Tapped Hole machining only on the same shaft. [ ! ]5 ≤ A ≤ 20 [ ! ] ZC = V, ZQ = Q Specified ZC = V·ZQ = Q W 1 mm Increments 6·7 5 8 6 9 7 10 8 12 9 10 14·15 10 11 12 16 11 12 13 17 12 13 14 20 14 15 16 25 17 to 20 30 21 to 24 35 25 to 28 40 29 to 30	KC, KV, C = 1 mm Increments Ordering Code KC8−C10 KV = Applied on V part KC = Applied on Q part [ ! ] Applicable to either V or Q [ ! ] Specify the C dimension not to be below b1	[ ! ]C ≤ 60 [ ! ]S (F) −C−KC (KV) ≥ 2 [ ! ]KC (KV) ≥ 2 [ ! ] When KC, KV = 0
							Applicable Shaft End Dia. V·Q Keyway Dimension b1 t1 r1 Reference Dimension Tolerance (N9) Reference Dimension Tolerance 6·7 2 −0.004 −0.029 1.2 +0.1 0 0.08 Up to 0.16 8 to 10 3 1.8 12 4 0 −0.030 2.5 14 to 17 5 3.0 0.16 Up to 0.25 20 6 3.5 25·30 8 0 −0.036 4.0 +0.2 0 35 10 5.0 0.25 Up to 0.40 40 12 0 −0.043 5.0 [!] Key materials are not included.

[!]Specify an alteration position to be 2 mm or more away from the stepped part. (Refer to the diagram in Caution (1))
[!] When adding multiple alterations, there must be 2 mm or more clearance between each machined part. (Refer to the diagram in Caution (2))
[!]When flat machining, wrench flats, square chamfering and keyway alterations are combined with each other, their orientations will be random. (Refer to the diagram in Caution (3))
[!] Do not specify multiple alterations in such a way that they overlap with each other in the rotating direction on the same shaft. (Refer to the diagram in Caution (4))
[ ! ] When two or more alterations are specified on a shaft, they may not be machined due to correlation.

Caution (1) Specify the alteration portion to be 2 mm or more away from the stepped part .

Caution (2) 2 mm or more is required for the clearance between multiple alterations .

Caution (3) When the multiple alterations are combined with each other, their orientations are random and thus, are not always aligned in a linear arrangement. (One example of this is shown in the diagram below.)　 For Alterations A and B added to the same shaft, as shown in the diagram above, their orientations are random and thus, there are some cases where they are not aligned in a linear arrangement.

Caution (4) Do not specify multiple alterations in such a way that they overlap with each other on the same shaft. (Any diagram as shown below is not acceptable.)     Overlapped portion of Alterations A and B